Spent a couple of hours last night fitting the metal barrel with Aber muzzle, into the Tamiya mantlet, adjusting the Heng Long gun internals to move a few mm to fit the correct offset of the barrel and then mated them to the Henglong internal turret bracket ( which did not have the offset )
It was only when I finished the int bracket, that I found I had the Tamiya one ( forgot ) which already had the offset!

Hey Ho, its done now.
Carved off the two aerial holders at the rear of the deck, which did a small amount of damage, but should be able to repair that. My skills are not that great and often its also about the tools you have, but at least I have patience, so can keep going back until I am happy with it.
I dont think I have ever got to the point of wanting to launch a model against the wall, although making the 1/35 Aber working tool brackets for a panther...got me very very close to the line. So tiny and too pingable...spent so much time running my hands over the carpet to find the bloody bits

I can laugh about it now...but it took two years of therapy

At least at 1/16 those same Aber tool brackets should be so mush easier ( P L E A S E ! )
Pics soon Dudes