David,

Those metals are hard to solder or spot weld. You have to use argon gaz to solder them, otherwise they would oxidate in time.
If your parts are small, I could do it for you. You can check what I did in the Savex L39 thread for my thrust pipe.
Spot welding is not as strong. If you want to make you own device, you need a powerful transformer.
For the simulator, give me youe address, I'll send you a copy of aerofly. Mine is already a copy of a copy of a copy...

Yann