HackerNAP front-end regulator daughterboard

All, for a long time I've been keen to make it easy to add regulation to the front-end of the HackerNAP, but there are relatively few good, affordable, space-efficient options for high-voltage regulation.

So... I had the idea of a daughterboard. The tentative idea is to remove the IRF[9]610s and gate-stabilizing 240R resistors, hook up a daughterboard via the holes left behind, and build the +/- regulators on the daughterboard.

On the board would be a simple reg: first the 240R/IRF[9]610, then a tracking pre-regulator (LM317/LM337), followed by a 317/337 and an output cap. The regulators would be setup according to Martin's advice on Acoustica: TPR improvements and regulator improvements.

The reason for LM317s is simple: they're cheap, effective, and can handle the 50 - 55V output required for the front end (LM317s are limited in voltage differential between input and output, not solely the output voltage).

This would of course necessitate a larger voltage drop than before. At present the gyrator drops ~ 6V. A TPR/reg combo would drop another 5V.

Thoughts? Is this of any interest?

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HackerNAP front-end regulator daughterboard