had my HF QH since 2015, no problems unless you count operator errors. And yes I bought a bunch of the cat 1 to cat 3 adapters and one of Ken's Bolt on Hooks adapters and the top linkage adapter from Ag South. And I run everything from a 1954 JD P 198 Bush and Bog Harrow,1969 Hardee T 52 LT rotary cutter Pop bought these new and I still have all the owners operator manuals on these,since then I have bought Taylor Way 410 tandem disc's,
9913 Scarifier, Sunshine brand 16 disc tandem discs, had to work on this to make QH adaptable, and L P 1572 blade, Terra Force 062 Tiller, couple of TSC Country Line implements, some other stuff I can't remember right now. And all of them work with my
HF QH, from the old to the new. Best money I've spent cause when you get older and can't muscle the $hit around like you used to, work smarter, not harder. Good luck to all on your projects.