Hi Randy,
I flew with Alice Cotton-Royer for a number of years. She flew an SV-11 with a Tom Lay ST .51. This was a special version that Tom made for her. The engine has plenty of power, even if you tend to build a bit heavy. No offense Alice, yours flew great, in fact she had two of them. Second one wore out the controls. Amazing flying companion as her husband Dave will agree. Ask Tom Lay about the "Sweet Alice .51".
Gerald