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MarkBass Vintage Preamp modification

I have made a fair share of research into bass preamps in the last month, trying to find a fitting preamp (pedal) for my new passive G&L Kiloton. I do like how it sounds at home at my amp, but I play into a DI at church, and I wish to have a few EQ/Boost options the way I do on my 6-string active Kiesel bass (to cut the mids sometimes, etc.)

I stumbled upon the Markbass Vintage Preamp, and I love practically everything about it. But there is a gripe that I have with it, and that is that it's FX loop is Post OD, and Pre EQ.

If anyone is both electronics savvy and has this preamp, is there a way to modify the circuit inside for the FX loop to be Post EQ?

If there was a way, I would purchase it the next moment, and go through the modification.

I can do soldering, and can read a sheet, but I don't want to buy the preamp if I can't mod it. Thank you!
 
I received some updates about the circuit. I emailed them about the chain, and this is what they sent me.
 

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That's just a high-level block diagram that's printed on page 7 of the owner manual for the Vintage Pre.

[This invalid link has been removed]

Oops, that's embarrassing lol. Well, yeah. From the block diagram it looks like it's not impossible. But from what I've heard about implementation, it seems impossible.

I guess I'll look into Goliath as a tube preamp/DI instead.

I love the EQ options here though. Tough choices…
 
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