I definitely miss the days of variety and performance parts competition. Westcoast, PJS, Coffman, R&D which sadly just recently folded...it would be nice to see those names make a return to the market. They all had patents and pipes. It would be really nice to see an updated Coffman Sizzler specifically meant for a freeride oriented 701. I can say that from experience the casting tooling does cost some good money but the actual alluminum/alloy casting process (which I do at my current job) is not hard to do at all, and it's not that time consuming. With today's alloys and refined casting practices, porosity is an extremely rare occurrence. Every once in a blue moon we will get a little trapped air bubble in a cast but that has only happened twice in the last two years of doing hundreds of casts. The biggest concerns are getting the alloy on spec which is a matter of just knowing the job, and having a good OES to analyze the samples before casting if it's an essential requirement. Otherwise a good and experienced foundry tech should be able to get an alloy very close to spec by just knowing the alloy series, volume of aluminum, grade of aluminum such as commercial pure or super pure, and having a predetermined recipe of elements to add. It's really not that difficult a thing to do when you know what you're doing