Hi Scott, No it would fly great for a few minutes and then start surging and then not opening up. I thought it was a clunk issue to begin with but that wasn't the case.

A couple of guys who have them here in the UK reckon there is a plug missing where the nipple used to be and that they had the same issue as me. When they blocked it with a grub screw the problem went away. Yet I contacted YS about this I was assured that there should be a hole there. Also similar info as post #2 from Wild Beat...? Not sure what to think so waiting for a replacement pump to arrive and then we'll see. At least it gave me a good chance to run the back up engine for Switzerland.

Keith