Second attempt at posting this. The first one was on my old camcorder and the quality was shocking so hopefully this will be better. Its a walkthrough of the way I have magnetised the new GW Blood Angels Baal Predator kit so it can be used as both a Flamestorm Cannon and twin linked assault cannons. I had to make a couple of heavy handed cuts to get it inside YouTube's 10 minute cutoff so apologies for that.
Hope some of you find it helpful,