Finally I took on replacing the LPG reducer, which was long overdue, and purchased months ago.
Great moment also to replace the hoses between reducer and tidy up the area - installer put two "T" in the engine to heater matrix and return hoses, whereas I was planning to put the LPG in-line with the heater (engine>LPG>heater and not disturb the return hose), as I think is the norm when you want to do it like it should ....
All was going well until I realized I did not do my homework proper and the pipes on the heater are 21 or 22 mm whereas the hose I bought was 19 (I measured with the caliper only on the engine side, did not imagine ...).
As I obviously found out too late to run back to the shop, also because I stupidly went over to a friend 25km away from home to spend some time there and do the job there while we beer and chat, I had to return to high octane "benziiin" ...
Was an expensive journey.
Tomorrow I will go again to the shop to get some size of 21 or 22 hose, and change one of the "L-angle" joints from 19-16 as I had purchased today. As I have no time to secure quickly a new return hose, I will ask for a 22-19 reducer as well, until I get the proper hose. I wanted to reduce the number of joints, but will have to be in two phases.
Will bring some pictures with the next update ...