enzojz @exposure4256OK. If you want to a simple good build quality holder in my opinion Haida classic is already a good choice. But for personal opinion, the holder from Lee is enough durable (I have using it since 6 years and it looks as new) and it doesn't have thermal expansion problem that other alu built holder has.
enzojz@exposure4256 The problem is, if you use a Nisi v5 like a Lee do, there's no reason of buying it at a cost higher than Lee. That's why I didn't designed it..
enzojz@exposure4256 I haven't designed such adapter for Nisi, since I designed bayonet adapter to make using CPL with holder easier, but the V5 pro is itself a such solution.