My LGS has a 2nd hand Marshall 7015 bass cab for sale for £129. A bit beaten up, but what the hey. Could this be the perfect extension cab for a DSL40CR if it was fitted with a Celestion G15V-100 Fullback? I don't know much about the Fullback or bass cabs (obviously)! Dimensions (mm): W 606 x H 606 x D 370 (the DSL is 620 wide). Weight: 35Kg! Central rear port. Anyone ever tried something similar?