Thanks for all replies.
In summary I have recut valve tip on my lathe. Now it doesnt leak. Valves are crappy anyway - cheap chinese manufacture.
In the mean time I have bought LT with additional melting nozzle. Mixed feelings. Torch is very very small. Too light. Hoses are hevier then torch itself. I was thinking about replacing aluminium handle with stainless steel one to add some weight.
Nozzles are very short and bent at about 45 degree instead of 90. So you have to lift the torch higher and have i closer to work - not so good. Nozzles arent fixed so you can rotate them any direction - I dont like this feature
Valves are vering smoothly and precisely - this is what I like the most
Melting nozzle works quite well. I have done some 80-100g casting with it and no coplains. But I think Hoke was slightly faster when melting.
What I dont like about this melting nozzle is that it has soldered tip instead on screwed on welded or riveted or everything else but soldered! I dont know whos briliant idea was it but its bad as hell.
Anyway, I will work with it for a while and time will tell if I will return to hoke (modify valves first) or look for Swiss torch or something else.
Also I have spoken with friend in UK who worked with chinese Meco and Hoke and he said that their are both crap - valves are too loose or stiff and not precise at all.