I know it's two-piece, but not that there's no thread on it! Probably the RS people used Loctite so I think the burner needs to be hotter the second time! I this tried before with no result...
Problem solved! Exactly as you told. I made an improvised tool. A 7.1mm hole in a piece of 12mm brass and a 3.95mm brass driver. And a little blow with a small hammer...
If I get a new type of car then I always disassemble it till latest bolt... and that includes the guide post holder too... Thats my kind of curiosity... In the subsequent assembly session I always try to improve something. Yes, sometime it fails... I am also investigating the possibilities of using a pipguide (slideguide) by PipSlot in this model Here you will find the history of the development of the Pipguide by PipSlot:
You could use the Scaleauto SC-1329 flanged ball bearings 3/32 x 6mm. However not very cheap! Beware if you order them then it is possible that these bearings are wrongly packaged with a wrong number (SC-1324). Like mine! There are other sources too.
In the left you see the 3/32" bearing:
Here I have them applied too. With the usual NSR, Slot.it etcetera stuff.: