yeah,
I concur, heavy bolters and auto cannon are good against troops.
But the extra sponsons on a lascannon preditor are a worthy upgrade, mostly you wanna park that tank on a hill and fire every turn until the end of the game or you tank gets killed... a small support squad is usful to protect the tank from close combat and to hunt Meltas before they get into range.
Lormax as a example of a magnatised preditor in his thread.
to get your own magnets. ebay is your friend, so many sellers competeing for your money means you get them fairly cheap.
look for Neodymium magnets, also called rare earth magnets.
you want round magnets about 3mm-6mm diameter for the sponsons. and between 1mm and 2mm deep
and between 6mm and 10mm diameter for the turret.
I used 6mm on my
Dreads something like these
magnets the process is similar to what you can do.
PaniC..