Mad, your #10 confuses me. I built a Beck Spyder, S/N 006, the second car he sold to a real customer. If you mean the car pictured below, their model number is actually 550, not 356. The 356 was available in a model called the Speedster. Very different body styles, other than both are roadsters.

All of Beck's cars were glass, to my knowledge he never did an aluminum one. Yes, the originals were aluminum. Chuck sold his tooling and the rights to the Beck Spyder name a couple years ago to come fellas in Texas. Are you saying they are doing an aluminum body now?