So, I start:
1.- I like to have complete units. So, for start I need to have 1 complete unit with MG. I think to have: 2 rattler/tricycle with MG, 1 tricycle ammo-carrier & 1 tricycle with the fire commander.
2.- the same with light artillery battery.
3.- inspired by BaronVonJ I need to have a rocket battery, i.e. 2 tricycle rocket launchers, 1 tricycle ammocarrier and 1 tricycle for the commander.
My idea to name them is: Light Mobile Artillery (and support)
What you think? any further suggestions for conversions etc?