Managed to get some testing done in between clouds and also collected this image of NGC6188.
It is 11x8 minutes of 3nm NII 4MB
http://d1355990.i49.quadrahosting.co...gc6188_NII.jpg
It looks like 3nm filters are the go if you want to go deep in narrow band with the Moon present. Below is a Stellarium image showing where the Moon was in relation to NGC6188. I was using the roll off roof to stop the direct Moonlight getting onto or into the RH200.
The guiding needs further tweaking as it seemed to be hunting. It could have been chasing poor seeing while I was dodging cloud.
Bert