I have read that Kiliton owners (and I think Lobster said it [them]self) that the Kiloton could seriously use a Bass cut pot like the L-Series does…especially in Series mode. Perhaps the best mod for a K-ton would be to install an L-2xxx-Series preamp and obviously forego the pickup selector switch.
Though I've seen other mods like the addition of an MFD P-pickup. In that case you could use the selector. But I guess that's whether or not the parts would ever be available again…
I didn't think the L-1500 needed its bass cut. Maybe it would have been useful through some rigs, and maybe on the five-string L-1505, but I don't think I ever used the bass cut on my 1500. I almost always wanted more fatness, not less.
From what I've seen, most other basses with single pickups in that position have active EQ, and I understand why.
