For anyone into 26.5, 37 and 40mm launchers as well as destructive devices in general...
Grog has always been the go to for information. He's active on several other sites but keeps a forum of his own dedicated to destructive devices and launchers of various calibers. He normally keeps registration closed but just moved his forum to a new host and registration is open
There's a ton of info but not a whole lot of discussion. Extremely important: There are rules, if you join be sure to read everything before posting and don't be a Gomer
http://www.37and40mikemike.com/test/index.php?sid=e77c3ab0c7b526c1dc6ae0ab04ca0b43