If they don’t want to stay on without glue, then magnetising them is definitely the best idea — GW would like you to purchase a second kit if you want the same thing but with different weapons, but at their prices …
A little progress the cockpit interior nearly done some washes etc to do but it's my least favourite part on aircraft.
I hadn't realised that these kits have full interior detail so painting that will probably be next before putting it together.