First of all, what is a "DL"?????? 2nd of all, none of you have ever tried the 3MM toc engine. Sure its a couple of oz heavier,but it is 3cc's bigger!!! Produces more rpms. So, I would like to hear from those who have or seen or flew a 3MM TOC engine and not those with so called theories. I have and flown a DA50 and I love that engine but I am open to NEW products that are cheaperin price that is produced in other places. The plane for the 50's are capable to fly with a few oz either in the + or - range. Power is what it is all about.