i think that maybe you could add the dispencer to the senetry somehow? possibly so that it is more like one of the carts, although it might be a bit too op then

Maybe Mini-Mobile Sentry: With an camera. You could see the camera from first person and shoot people. It deals alot less damage but it's really fast. (maybe not as fast as scout or something)

The teleporter could be A and B waypoints.

Mobile dispenser that follows engie in a straight line, but is slower than him. 75% of engie's total speed. Hp and supply dispensing could be between lvl 2-3 of a normal dispenser . It could only follow engie and gives ammo and hp only when still- left click to "park" or wait until it's near so it stops. (One issue is that Engie could follow a Heavy and give him almost constant resupply)

The one thing that an engy needs the most is an official dispenser replacement, some custom servers already use a building repair replacement and some use a minicrit boosting building, and they both work great and don't unbalance anything.

Thank you for the suggestions.
Someone has suggested a mobile build to repair the constructionsn it would have a slow rate or reparation and low HP and give ammunitions, i think it's a good idea because a mobile dispenser would replace the role of the medic.

Something called "The Repair Station".

:)

I suggest adding different modes to it. To get to tthat specific mode, the Engie has to "upgrade it", which costs about 75 Metal.It goes....

Dispenser mode-->Sentry mode--->Rocket mode---and possibly---->Flamethrower mode

Of course, if it were to go so close to use a flamethrower, depending on how much HP it has, the chances of it being destroyed will be increased sigificantly.

I like the idea of having the dispenser onboard to the guns.
Could a teleporter onboard be Possible ??? maybe only when parked at "point B "
The design is awesome! i like that it has no rockets, (would be unfair)
Looks way too intense and needs the power of an auto sentry not a level two sentry
The "follow to point B from A'' sounds legit, Having follow is no good needs just 1 path with stop and go option.
Would have to be a new PDA to show the different options and would mean PDA use would be mobile sentry use only, no standing sentrys and maybe even no Dispensers (dispenser on-board
The return to Point A upon death is not cool, it should go autonamous and continue between A and B(after 3 sec like when u switch from warangler) until destroyed,
Also you could Add " Use requires Metal" You pick the rate and mebbe no refill while in use ?
Linko hope you readin this add me up i have an idea for Rescue ranger ammo...