Congratulations! Even though I am a devout band gun user, I think a pneumatic gun makes sense for your situation. It should be more versatile, powerful & smaller. 40cm is extremely short though. A 60cm band gun would be as long as 70/80cm pneumatic because they are measured differently. So might have been worth considering a slightly longer pneumatic. I've been pleased with my Beuchat gear.
Thanks Mr X, I will know by Friday if my cough and sinus is clear by then. I really would love to go longer but concealing the gun is my first priority. Anyways, if i get my vacation this year, i'll be goin for a 90 cm to 110 cm RA band gun for Philippine waters:friday
Cheers
Elvis:friday