ive also eco BB's in my VS tanks with now problems as well as my airsoft guns.any bb can be out of spec just look at the ones that come with the hl tanks. the paint balls are the same. if you check the pellets before you load the gun or tank you should be ok. if im not mistaken there is a thread on the subject and shenlonco even has a video of a tank firing the paint balls. i havent posted in here much lately due to getting my feet wet as it were with the rc tug my wife just bought me . oh shenlonco i agree you should br employed by vs with all the ideas you have given