A NDY 3 . Besides, if pard has J10x , we are the right side. Hopefully he will know that I might have only 2 spades for this bid, and since he has already shown 5, can bid 3N knowing I will correct with certain hands with 3 card support. Partners have this habit of bidding the obvious game or cue bidding towards slam once they think they have found a fit. At MPs I would be more tempted just to try 3N myself.
Length minimum depends on methods.
One of our current problems becomes a non-problem, because we have no way to ferret out unstopped suits after this start. R OBB I would bid 3 spades. Besides, one club stopper may well be insufficient. I'm not fond of the 3 waffle. I think we should be playing in hearts, diamonds or notrump.