Ah. I see.
Well, if you do fly Quadrantals, you must fly them as Flight Levels, ie. on 1013.2 hPa.
Nothing to stop you flying IFR if you like, even if you don't have any instrument qualification, as long as you maintain VMC.
In the situation you suggest, you should choose an odd level+500' that gives you at least 1,000' above the terrain, and at least 1,000' above the cloud to maintain VMC. eg. FL055, FL075 etc.
It does no harm to fly Quadrantal levels in the cruise. If everyone did, collisions would be a bit less likely.
As for the long legged beauty? Well I believe there are other forums where they specialise in that kind if discussion. I wouldn't know what they are though, of course!
MJ
