You might be able to gain a little more speed on boot if you remove the bytecopies to phantom ram near the start of init. If you have already, then disregard this reply. =)
. fe0cd a0 03 ldy #$03 ; i haven't triple-checked but I think it's as simple as changing this #$03 to #$01. ; only thing that realistically provides (if wanted) the missing ram blocks is VICE, ; except for the very few double MMU ram block mods out there.