Is it possible to use the built-in HX Effects pedals AND external pedals in FX Loop connected to Two-Notes Reload II FX Loop?

[dmparis]

Hello! I have a somewhat complex configuration I'm trying to achieve, and could use some help figuring out the best way (if even possible) to set it up. 

 

I recently acquired a Two Notes Reload II Attenuator/Load Box, which I have in the Attenuator Loop of an N-Audio 4x4 Amp/Cab Switcher. 

 

I want to use a 4 cable method to send the pre-FX (drives and non time-based FX) to the amps and then use the FX loop for reverbs, delays, etc. in HX Effects presets AND external pedals like the Strymon Big Sky in the HX Effects Stereo FX Block, connected to the FX Loop of the Reload II, so the FX can be used across all amps.

 

I can make it work if I use the stereo INs and OUTs of the Big Sky, but then I can't put the desired HX Effects processing in the post-amp FX chain. Again, what I'd like to do is be able to use a built-in reverb, let's say, in an HX Effects stereo FX block (using FX Loop 1/2) OR the external reverb from the Big Sky or other pedal using the 4 cable method.

 

I'm almost confused even writing this! Appreciate any help in getting the cabling right - if there's even a way to do it.

 

Thanks!