So can I use Holoprojector Lv1 and say that "this model is Bagh-Mari Sniper Minelayer with 2 mines left" ? (and have an actual model under the nearby camo)
No. It's been asked numerous times previously. Holo 1 allows you to impersonate a profile. The BM MSR Minelayer profile comes with 3 AP mines.
You will find it if you search for it. Make sure you name IJW specifically. Holoprojector rule says you can pretend to be a profile on your list. There is no profile with 2 mines, only 3 mines.
Indeed that is the case, of course you can deploy a minelayer without using the skill and a camouflage marker next to them if you want to pull a similar surprise.
Yes, that's why it works you say you have a Bagh Mari sniper with 3 mines and a camouflage counter (some actual camouflaged unit) next, your opponent assumes the bagh mari is a Sepulcher in holo when it is indeed a bagh mari sniper.
Yes it a trick, but different one than I was asking (if it is possible) :) Still not a terrible surprise ;)