heres one i would like to see
PL_hatfactory
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=519120236

congrats on being a real team player on the custom tf2 weapons

The Twenty-Six Shooter (engi secondary)
model:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=147834812&searchtext=

+20% Damage
+ Almost instant reload.

- Same firing speed as a level 1 sentry.
- Can be sapped witch makes it unusable for 15 seconds.

soldiers backup (soldier secondary)
model:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=146337659&searchtext=

+shoots rockets instead of shotgun shells
+20 damage
+clip size
+10 blast radius
-10 firing speed
-20 reload speed

The R-CAT (engi PDA)
model:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=178729203&searchtext=

130 metal to build
100HP
Half ammo of LVL1 sentry
64DPS
60 second flight time
Return to helipad to re-fuel/stock ammo (or explode at end of flight time)
can only control with the wrangler

The Defensive Engi PDA
model:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=21057&searchtext=

able to make a shield generater
sheild generater stats
-can be entered by enemy team (bodies) but not projectiles, unless shot inside barrier
-can be sapped
-low health(100-130)
-replaces sentry
-costs 150-180 metal
+creates barrier that is able to house 2 players(at lvl 1)>3 palyers(lvl 2)>4 players(lvl 3)
+building can be built within
+damage done to barrier has no effect on building health or degrades barrier power

able to make a bear trap too
bear trap stats
-replaces tele
+immobilizes any 1 player (opp. team) who steps on it and deals bleed damage as player struggles in trap
+3 to 5 can be built
+very cheap to build (maybe 25 metal cost)
-engineer must repair it to re-arm it (hit it with a wrench 1 to 2 times)
-very low health (25-50 health)
-can be sapped very quickly

the texens welder (engi secondary)
model:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=389289085

+burns enemies
+repairs friendly buildings
-reduced range
-50 ammo

the spy cutter (pyro melee)
model:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=433881453

+10 damage against spys
+20 fire rate aka swing speed
-10 damage against none spy players

spy igniter (pyro primary)
model:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=433881843

+30 damage against spys
+10 extra ammo from dispencers
-20 damage against none spy players
-10 ammo from ammo boxes

battlefield backpack (soldier secondary)
model:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=500451338

+Damage dealt fills meter (just like the other backpacks)
When activated constantly refills ammo, increases attack speed and reload speed (applies to nearby teammates, too)