LKH is an innovator, as it seems that no one seems to know where some of the forms came from. So let's say if LKH modernised some of these forums, does that make them less Hung Sing then the other older Hung Sing forums out there? What if he even made some of them up, does that make it not Hung Sing also? May be you should ask the Hung Sing Gwoon Jeung Mun Yan why, I know I will if I get chance to meet him. Tarm Sam and every other major Buk Sing Master know to man is also listed in Hung Sing Gwoon annuals, so why should LKH be treated any differernt. The LKH standard Hoi Jong where we strike at nose with the palm, I have not seen that in anyother lineage. Chan at this point seems to palm from below to up, Buk Sing seems to strike down too. These forums I have not seen close substitutes:
Sup Jee Ku Da (I have not seen another version like this)
LKH's Siu Miu Fa (LKH made this one world famous)
Leopard Elbow
Tit Jin
Fu Pow (You would normally not see this forum so easily)
Maybe these forms are the most authentic Cheung Yim forms, but who knows as none of this stuff is documented. One thing I know for sure, there aren't any Chan techniques such as "Chan Hueng's Special Fist" in these forums. Other's I don't know, as I haven't learnt them. I started Ping Kuen recently and the bagua footwork is pretty insane, Chan or Hung Sing, it makes me mobile fighting more then one. We hold our Chap choi with thumb all the way back, I don't know other lineages who adovcates that apart from Sifu Frank's Gwoon. The LKH lineage has it's own horse too.
I guess I just have to spend my life learning all three lineages to really know what the hell is going on. But what would that make my kung fu then - good kung fu or just "mixed"?