[RAF_Magpie]

Armour as a load out? Yes, definitely possible, but your problem relies on the amphibian side still - you may need to choose to have it as a land plane or a sea plane - but not both...

I would suggest PM'ing Fireball, and see what he can do to help you in that regard; like wise MrJolly & Hunin, or Charlie-Chap & Maus would be your next port of call for the FM and Classes.