The Super Tiger is a fine carb. So there is little or no surprise that it worked.
The MDS carb is also a fine carb. If you have anylised it, I have to ask what was /is the problem with the MDS carb? They run surprisingly well on low or no nitro fuel.

This would be a great topic for my closed carb thread. Give it a read if you have time.

http://www.rcuniverse.com/forum/m_10015277/tm.htm

It is not clear why the moderator wanted it closed. I even said a few nice things about the OS 4B carb. It just doesn't add up.

All the best,

Konrad