Yes. The BlackHawk Tactical CQC Holster Platform will work with T-Series holster but will require the duty accessory mounting kit. You can find the accessory kit by using the following link:
https://www.opticsplanet.com/blackhawk-duty-accessory-mounting-screw-kit-ta-holster-platform.html
Unfortunately Blackhawk does not make a holster for the FNX45 Tactical at this time.
It can but you would need the Quick Disconnect System to mount it.
https://www.opticsplanet.com/blackhawk-serpa-quick-disconnect-kit-430950bk.html
It can but you would need this https://www.opticsplanet.com/blackhawk-serpa-quick-disconnect-kit-430950bk.html to go with the Omnivore holster.
Please email us at techsales@opticsplanet.com for further assistance.
The magazine pouches use a rail system to mount, so you would need a rail kit such as this: https://www.opticsplanet.com/blackhawk-cqc-dual-rail-accessory-belt-loop.html. Each rail should be held on with two screws which can then be transferred over to the thigh ring. Then you can mount either a double stack pouch: https://www.opticsplanet.com/carbon-mag-pouch-single-mag-case-double-stack-9-40.html or a single stack pouch: https://www.opticsplanet.com/blackhawk-cqc-carbon-fiber-mag-pouch-single-stack.html. Due to the size of the holster on the thigh mount, you most likely will only be able to fit one magazine pouch on the rig.
Yes, the Epoch Level III holster should mount to this drop leg platform.
Yes, this holster will attach to that thigh mount.