I think I'm sorted. I've picked up two TE 1 X 10 cabs from @fleabag Each weighs 7kg or just a bit more than my cat. I needed an amp with more headroom than the Elf but didn't want to spend a fortune so grabbed a B stock HB Bass Block to use as a power amp after my sansamp. Tried it all at rehearsal tonight and sounded excellent, bags of headroom, clean and very punchy. I'll hang onto the MB gear until I've had a chance to gig test it all but I think it's going to work. Thanks also to @Calex for his advice as a user of the same cabs.