Magnetized battlesuits

Personally, I am not too strict on the "what you see is what you get" rule, but magnetized weapons is a nice way of keeping track of who carries what. You can get some cheap 2 mm magnets off eBay. Drill a hole with a 2 mm drill, and the tiny magnet will fit perfectly. They are quite tricky to handle, since they are not only very small, but also very strong. Also, make sure you put them in right, otherwise they will repel instead of attract each other.

Three of my battlesuits with magnetized weapons

Speaking of battlesuits, here is a unit that is fun to bring to a fight. I call it the firefly. Take a lone battlesuit with cheap weaponry: one or two flamers and nothing else. Let him deep strike behind enemy lines to torch some infantry. You can also give him a fusion blaster and watch when their biggest tanks start to sweat. Then watch the firefly go up in flames! All for the Greater Good, of course.