Sorry to annoy or anything but I can't help but to suggest some stats for the weapons

Pocket Processer:
Builds Energy Sentry and Dispenser both of which do not cost ammo (Ammo is not Metal)


Energy Sentry:

Level 3 Fires Laser Similar to Pomson 6000 in Visuals and Statistics

Pros: Does Not Require Ammo (Along with Dispenser)

Cons:
Fires Traced Shots (similar to Wrangler/Machina Laser)
Deals 15% less Damage on Normal shot
Glows in the Dark

Notes: The fact that it's shots do not cost ammo combined with the Never-Ending Dispenser makes a fast building nest, a level 1 dispenser alone would be indipensable.
It's Unreflectable Pomson Laser makes it a terror against Pyros and Medics
Unfortunately Dealing less Damage, lacking Rockets and Glowing makes it slightly terrible for an Ambush


Energizer:

When Building is Fully Upgraded and at Full Health, Two Hits on it with this Weapon causes it to Increase in Performance
Pay attention though because three, on the other hand causes said building to explode, slightly damaging those around it

Pros:
Overcharge causes:
- +10% Sentry Damage
- +15% Sentry Rotation speed
- +10% Dispensing Speed(22hp/s 44% Ammo/s 16% Cloak/s)
- 2s Faster Teleporter Recharge Speed
- +10% Health
Explosion can potentially kill nearby enemies

Cons:
Explosion can destroy your work and potentially kill you provided you have little health
If the Sentry loses it's rewarded health the Overcharge is lost
Overcharge can only be done with self made buildings
Overcharge causes:
- -25% Repair speed
- -Builder receives -50% dispensed hp/ammo/metal


Notes:
Great for an strategic Engineer
Despite giving normal Sentries an "unfair" damage boost, normal sentries use ammo, thus to reload them a 3rd hit would be necessary
But if the Sentry gets damaged, the Overcharge goes away allowing Ammo to be replenished
For Energy Sentries, they still have -5% damage, but have a much faster Rotation speed
Dispensers give more health and ammo to other players but not to the builder itself
Teleporters help the team 66% more compensating for the lack of Energy Teles

Researcher's Relay:
"Receive, intercept or disrupt all of those fancy electromagnetic signals flying through the air with this marvel of modern science. Created with cutting edge technology (and some old radio parts). "

Polar opposite of the Wrangler

Can Deactivate or Control Enemy Sentries
Press the "Reload" button to switch between Options
Beeps when Sentries are near

Pros:
Beeps when Sentries are near

Deactivation:
Can deactivate multiple Sentries at once
Sentries stay Deactivated for 10s even if Weapon is not Active

Control:
Controlled Sentries suffer from Friendly-Fire

Cons:
Cannot Control and Deactivate the same Sentry in one life

Deactivation:
You must aim at Sentry to Deactivate
Reactivation is speed up by Enemies hitting Sentry with Wrench or are using the Wrangler

Control:
Sentries have to be in line of sight to be able to control
Upon Dis-control, Sentries reactivate immediately
Can't be destroyed by you or your teammates

Notes: Perfect for reopening paths and destroying Sentry Nests
"Deactivation" can stop a lone Sentry from working and make it vulnerable for destruction

While "Control" Controls the Sentry so it can shoot all enemies nearby but cannot be destroyed or repaired by you directly or your team

Despite that the Fun Factor "Control" seems like, it also keeps you in a headlock, not being able to escape without killing yourself (most of the time), you can't look away from the sentry for to long or you die

"Deactivation" is better for Strategic reasons, basically sapping the Sentry but it just takes a reboot with a couple wrench hits or a Wrangler to ruin your day

Not to mention you have to choose between one or the other per Sentry