The bike mechanic at Action Bikes changed the cable from 5mm to 4mm which worked better. I felt the cable developed too much slack when folding/unfolding reducing the efficiency of the gear change. I'm not technical enough to advise you on combining the juju with a trigger shift and will pass that one on to Jur. Action Bikes happened to have the Deore bits in stock. Also check ebay as follows:
http://cgi.ebay.co.uk/Shimano-Deore-LX-Rear-Derailleur-Silver_W0QQitemZ220248179347QQcmdZViewItem?hash=item220248179347&_trkparms=72%3A12|39%3A1|65%3A12&_t rksid=p3286.c0.m14

http://stores.ebay.co.uk/Woolly-Hat-...QQftidZ2QQtZkm

Not sure if this trigger shift is compatible with all Deore derailluers below:
http://www.cyclestore.co.uk/productD...roductID=11060 and
http://www.cyclestore.co.uk/productD...0975&catID=579

Last lot should work together. Although I'm good on understanding and researching products I'm not that savvy on the technical areas of bike components. I do know what I want though.

If it wasn't for the 50% EU dumping tax added to Downtube's bikes from the US, I'd have shipped in the Downtube FS H 8 speed (hub) bike ages ago. I'd love the 8 speed hub on this frame. I'm a hub fanatic really.