With some assistance from the ever-helpful Mr. Cropp I managed to get the RepRap up and running again tonight.
• The four screws previously attaching the heated bed to the two wooden frogs underneath have now been replaced with M3 bolts and nits - this is a lot more secure and it's unlikely it will pop off when levelling the bed now.
• The feed-end of the PTFE tube has been trimmed with a clean cut, this was getting really shabby, popping in & out and basically not behaving.
• The sprung bolts on the feed mechanism have been tightened meaning it extrudes a bit better.
• A blockage was apparently cleared from the hot end.
• The bed was re-levelled, although not perfectly and one side is still slightly lower than the other.
• The Z-axis rods were tightened at the top, and the split blocks holding them to the stepper motors were tightened to the max - with added padding tape around the PVC tubing.
There's still a couple of things left to do;
• Replace the M3 screws in the Z-axis split blocks - the heads are beginning to wear meaning it's not easy to tighten them.
• Re-level the bed to perfection
• Fix the wobble on one of the feet
• Reapply the Kapton (again!)
• Establish a permanent home!
I am going to shop around for a mini-greenhouse to put on top of it, and also try to order some wider Kapton tape. I notice the space is also running very low on Isopropyl - I have a bottle at home I can bring in and decant half of it into the bottle at the space.
I might pop back tomorrow to finish some of it and have another play if anyone's up for it?