Yeah matty nobody was on except for firestorm who was about to leave so :/
Anyone else interested want to suggest a time they're available? Please keep in mind time zones, school and work whatever for other.
Also I have decided, in anticipation of what I expect will be the next or 2nd next update, to play engie alot more. I was on cp_orange_x3 (which is probably one of my favourite maps), and I developed a new tactic called active engineering, which is damn fun. It is so much more interesting (and rewarding, if played correctly) than tanking behind a level 3 sentry near the intel, which I'm sure we all agree is more a chore than fun, a neccessary job that your team needs. Well active engineering basically consists of using level 1 sentries, based on the fast that if placed well, they can still be devastating. A helpful little technique is rotating your sentries (right click) so they can fit right up against walls rather than you backing up against the wall and leaving them forwards a little. This can be important for a couple of reasons, the main one being that since you aren't there, your sentry needs to unseen until it is too late. If it is backed up against a wall they will take longer to see it and there will be less chance of them getting to cover.
Another much more situational use I found in orange_x3 was that it could fit behing these small slopes and be unseen but if I backed up against the wall and built it then they could see it from the smaller end of the slope, though I doubt that's useful outside that map xD
Once your sentry has been destroyed, it is absolutely paramount that you rebuild it somewhere else. Even if it's a great spot that got you quite a few kills, move it, because surprise is the key here, and you'll get more kills from the newly placed sentry (if placed well) than one they are expecting. However, if your sentry got huge kills (like 10 in one life or something) then I suggest you abandon active engineering and tank that shit to level three with a dispenser. Even then, once it gets destroyed a couple of times (or once if the enemy team is small and they all know it's there because it becomes worthless again), go back to AE.
But sentries aren't the only thing you should play with, because engies are valuable team members. Place teleporters offensively, since you will be running around alot anyway. If one or two people get through far up in their lines, excellent. If not, who cares? Rebuild 'em. Also, teleports bag you points, and the more the merrier.
Onto dispensers. First and foremost, you don't use them. You don't have time to build a dispenser by a sentry and you're not tanking it, so build it in a place where it's useful to other players, like a sniper deck or area. They'll be really grateful, as they won't have to rush back to spawn rooms or shout for medics who will likely ignore them as they are low priority healing targets, just like scouts.
Most important are your weapons. Use them. You have a shotgun (for short-med distance, a pistol (for long distances, and it has ridiculous ammo!) and a wrench (for very close range, and it has a huge crit rate!)
All of these are surprisingly effective, but common sense is key...don't be doing this kind of thing on the 2fort bridge for example...you will just get killed. However, on alot of maps, there are oppurtunities for the engie to ambush and kill enemies. Orange_x3 is a brilliant map for this, so I'll use it as an example. Basically theres a large three story tower in the centre of quite an open battlefield though the final cp is round the corner, near spawn. The important thing is the tower, which provides excellent blind spots where the enemy can ran up stairs facing the wrong way to be sentried from behind, or run out past a trench and get slaughtered. This trench is also an excellent spot for placing tele exits in enemy territory, and for placing dispensers in friendly territory if your team hasn't pushed very far forwards. All the while the engineer can place dispensers (or a tele exit if offensive ones keep getting destroyed) at the top of the tower to support those on the cp there, while jumping off and around the tower and shooting a couple of shotgun bullets as he falls behind enemies, set up for a wrench or pistol kill before retreating up the tower.
Also, always remember that staying alive is more important than keeping buildings alive. They can be rebuilt easily, and are expendable, especially using this tactic. If a spy places a sapper on a building, don't rush back to it in a mad dash only to not get there in time and realize you wasted the oppurtunity for a kill or an assist AND your building was destroyed.
Basically, get your priorities straight.
edit: wow, tl;dr...
For those who skipped it, it's a mini-guide to a new engineer playstyle I call active engineering, and it's actually fun. If you hate engie because it's boring, have a read.