My kid loves Space Marines, and there's no around it - they are cool. We've been searching through old trash boxes and found 30+ broken, badly painted marines. Some back from 2nd edition. We've been removing as much paint as possible.
Now I'll convert at force with whatever bits I have from other auction job lots.
We need some devastators with big guns. I had a bunch of devastator weapons from some trades and will try and work them on the old 2nd edtition monopose marines. There's som size difference and it'll need a bunch of greenstuff to fit (and connect the wires to backpacks).