2.) Volksgrenadier unit organisation
a.) Formation 480 (VGren Btln HQ) contains an engineer platoon. However, it seems to me that Volksgrenadier battalions did not contain engineering assets, though Volksgrenadier regiment HQs contained an engineer platoon.
b.) Formation 255 (VGren Zug) has currently three 12 man squads plus two AT teams, for a strenght of at least 40 men. For comparison, the historical TOE strenght seems to have been 33 men, including a medic and two cart/wagon drivers. Maybe a better presentation would be e.g. three squads of 9 men plus one AT team?
For references I used this pretty well-researched website:
http://www.bayonetstrength.150m.com/...0to%201945.htm