If it helps in the short term, what our bloke ( Hi Nigel) does is cuts the swaged ends off, modifies 1/2" pushtail fittings by drilling them to 13mm, (a space around allows silver solder to sweat in well) inserts the original cooler line end(Cut off and cleaned etc) into the fitting and silver solders it on. This means you can just lube up the 1/2" blue HiTemp line and push it over the barbs of the pushtail fitting. Meaasure the length accurately, because after the line is on, you can't pull it off short of cutting it off. Use new O rings on the other ends and re fit. I actually bought these fittings once from a hydraulics supplier, and tried to make my own. Way back when my silver soldering techniques were pretty average(!) so I trashed that idea and hid the results in the big blue Collex filing cabinet outside....Then rang Nigel.:D :D
I'll get some actual fitting numbers for you, then give them to your bloke.
JC

