FrancesHinden, on 2015-February-03, 03:53, said:
I'd make a limit raise, not a mixed raise. Partner shows a slam try with club shortage, and I sign off. We may still get to the 5-level, which isn't safe.
Seems hard to get to the 5 level if you have this auction, responder has a slam force if partner bids again over a signoff. Of course opener should not bid again over a signoff needing 2 aces + more from a partner who signed off.