Dahlquist crossover upgrade from Regnar?

Has anyone upgraded their old Dahlquist speakers with the crossover kit available from Regnar? I have a pair of M-905s which I still love, but I’m curious to know if the upgrade kit makes an appreciable difference in the sound quality?

Also, how tricky is the installation? Can’t be too bad (ha, famous last words…), but if there are any tips or tricks you can share, please send them my way.

If anyone has experience with this I’ll appreciate hearing your thoughts. Thanks in advance!
Well, the resistors are clearly marked, no problem there. But looking at the caps is a fifty-fifty proposition...

One of them says "10K 100V" which I think makes it a pretty unusual spec (just based on what's available at Sonic Craft, there are not too many product choices for this capacitance).

But the other one just says "Dahlquist 1060 - Mexico"...Which is pretty cryptic. So if anyone knows what the actual capacitance of that little bugger is, please fess up!

The inductor has no markings at all, so that's a mystery too.

OK, just in case anyone is following this, or at least for the sake of future generations, the mystery of the unlabeled capacitor has been solved. I called Regnar and asked about the M905 cap specs...

1. Low-freq cap is 10,000 micro Farads (as labelled)
2. Hi-freq Mystery Cap is "5,000 to 5,500" micro Farads (allowing for 10% tolerance)

I also asked what brand caps ship with Regar's M905 upgrade kit. He said they're made by a European company called SAS. Doesn't ring a bell for me, but then I'm not very knowledgable about this kind of stuff. Haven't decided yet what caps I'll use yet, I'm planning to call Sonic Craft this week and ask for some info & advice.
Just seeing your post.  I just got a set of m905s and would like to recap.  Did you find out what the proper replacement is?  Thanks,
Call Jeff at Sonic Craft and if necessary email him a picture. He will guide you.