I am understanding tha Mr. Marvel is now working with Nelson custom guns. There was allegedly some very ugly business moves by the company that you are trying to communicate with, including pushing Mr.Marvel out. You'll have to google all that. Also, alot of folks like these are at camp Perry this past few weeks. If you want a slide built by Mr. Marvel, you need to call Nelson, they may be able to help fix your existing slide too.
good luck