Hmm. Interesting. What about cooling? Also what are you using fire control?
If going this far...
Might be worthwhile swapping out the clear acrylic panel for a glass one.
Glass produces far less chromatic aberration, helping blend the light more rather than spread it out as it passes through.
I have modified a few things here and there myself. You wouldn't be able to get exact because radion doesn't release there spectrum exactly. They just use names which gets you close. For example Violet is 430nm in most cases. But don't know for sure. I would also imagine radion uses Cree surface mount diodes.
Was a thought and wasn't sure if anyone elses mind went there when radion released something that looked more like a black box layout wise than there pucks.
In the past, Ecotech has used a number of LED vendors, including Osram and Cree for various LED positions, and has largely used SemiLED for the violet channels. Assume a mix of 435, 425, 415, and/or 405. I'll take a loaner unit if you want confirmation and I can hit it up with the spectrometer
The various eBay import LEDs are in the junk category for efficiency, proper ratings, and longevity as they are built down to an absolute price. If you're ok with that, then don't let anything stop you