Oh man, can you upgrade my ebay order to a brass one . I can paypal the difference if you need it. (Or just start a tab )
When it comes to choosing materials flexibility is a what can get you more market share. Talk to DDAY, but him being able to have steel pipes made and aluminum got him my business for sure. Even though steel took longer and cost more it was worth it to me.
I think you will make a bunch of your sales in aluminum like DDAY does. But those of us trying to (legally) recreate a blaster of orignal parts steel is really the only option. Its near impossible to solder dissimilar metals so attaching aluminium parts to my steel tube would have to be done with two part bonding. Which honestly may be strong enough, but its just that last little detail where its just not perfect.
So for me at least if you had steel grip frame and end cap retainer I would be overjoyed.
But at the same time like everyone will say. Aluminum is lighter and better for trooping. But thats why I would buy two.