Jeffie
XLS is new series, I'm using Magnum .46 XLS not XL, the manufacturer are the same.
ATVAlliance, Part breaking in is done, and this weekend I would completely break it in hopefully, did not notice any leak, but it's a good suggesting of fitting the tubing into the high speed needle valve one of my friend did long time ago to my Evolution .45 engine. One engine I would certainly try and it's a tremendous powerhouse, that is Blue colored JBA Engine
Here is the link
http://www.kangkeusa.com/superkraft.htm
I've seen some of the videos of it on youtube it's an absolute power house. Evolution, Magnum, ASP, JBA they are all Chinese made, and China is doing good job. Taiwanese motor Thunder Tiger is great in running as well, they are more expensive than magnum and ASP. There is a long list of purchase

but I gotta buy me a plane for my ASP .52 first, either Yak or Mustang from Nitroplanes.com
Thank y'all
Mody