OK, getting fedup with this now

Yes, car goes like a rocket now, brilliant BUT it is so difficult to start now!
Could this be something to do with the IP-adjustments carried out by the rebuilders? I have to turn the coldstart knob on the dash right up to maximum and play with the gaspedal just to get it started and ticking over, after a few minutes it idles fine if a bit smokey which it never was before. Then it revs up on its own till I turn the coldstart knob down again

Temperature here in the UK about 7 degrees C

Glowplugs are new (or so they tell me )
Where to look first?

All advice greatfully recieved

Thank you for your time

Regards

G.