Ok here goes...

1. Opened up the top of the damping fluid reservoir - it's nearly full of fluid, or certainly looks to have a lot in there. Remove arm, turn it upsde down and wait 20 mins for the fluid to drain out. Result? A bit more zest to the sound.

2. Remove the standard feet, replace with RDC cones (none-threaded unfortunately) which whilst a bit precarious has tidied things up - more transient impact certainly and less 'hash'. Best compromise seems to be to use the top board off my Audiotech table and put the cones under that.

3. Fit M75ED - bit soft and woolly (as one would expect I guess) but less shouty, and more pleasant to listen to. Think the stylus isn't in its first flush of youth as there's a fair bit of sibilance and distortion on peaks. Still, whilst it won't stay in the arm it's a valuable exercise.

4. Been getting channel imbalance - change records and one channel dies. Check arm cable, there's a duff connection. Swap channels on back of amp, dead channel follows cable. There's also a small amount of distortion on that faulty channel too, indicating possible weak connection which won't help the sonics.

5. Going to borrow a low mileage Dyna 10X5 off a mate this evening to hear a more demanding cartridge in the Jelco. He also says he might have a spare arm cable which I can borrow.