ICS L85A2 Barrel & hop upgrade assistance

[pottage7]

Hi all.

I'm currently looking to upgrade my L85 with a new barrel and hop bucking, but I've never been inside a hop unit before so I don't want to mess anything up. I've heard talks about the ICS hop unit being proprietary, this won't affect me from upgrading the barrel and bucking right? Can anyone suggest a barrel and/or bucking? I have my eyes on a MADBULL 7075 ULTIMATE 6.01 TIGHT BORE BARREL 509 MM at the moment, but I'm not sure which bucking to get, or even which buckings are compatible. I've heard that older L85s have had trouble with upgrades, but mine is only about 4 months.

Thanks in advance for any help.