Well I got 5 of my 50 bases in today (very low on stock at supplier).
Here’s what I’ve done so far. When I build my Wych squads 6 of each will be magentized so that they may go on either a base or the raider itself so that when the Raider is (briefly) on the table it looks much better. The problem is that metals have issues staying in place (especially with a coat of primer & paint between them) when holding up pewter models. The solution is to drill a hole next to the magnet and pin the model via the magnet to both the raider and the base.
Here are a few pics of the pewter solution:
