Mine does not sit flat on the port side.  It has gotten a little worse over time.  Someone else had a post about this a while back.  I think it may have been determined that the plywood inside the sunpad may have warped some.  I'd say I have about a 1 1/2" gap on the port side.  Not enough that I'm worried about it.  It still latches properly and it doesn't really bounce around in the wind while underway.  I imagine it may lift some when trailering it at 65mph.  If mine continues to get worse, I'll probably put a 2nd latch of some sort on the port side.
					
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2007 Horizon 210
5.0 Mercruiser Carbureted/Alpha I
