I currently have a Fat Mamba MK3 with the defender grip it came with and MFG crosswind pedals. I'm not too happy with the defender grip and looking to upgrade, it is possible for me to get the MCG pro grip and I will then have to update the firmware to install it. I will likely get a gunfighter 4 with the LH space grip and some adapters to try out the omni throttle for the second stick.
I guess my question is would you go through upgrading the grip on the fat mamba and dealing with firmware and having one stick on the black box system and the second grip without it or would you just upgrade the mamba to a gunfighter with the MCG ultimate grip. I've been told that the ultimate grip on the mamba is likely too heavy and would possibly lean, would also require new firmware that isn't readily available so its not really an option. I've also heard that the ultimate grip is worth it over the pro grip. I'm honestly not familiar with the VKB black box system and if there would be any issues mixing sticks with/without it. The gunfighter also has the dry clutches which the mamba doesn't.
I take good care of my equipment and will likely be using the setup for 10+ years. My mamba will turn 10 years old next week