What is needed is a smaller router - power is not so much of an issue here.
Three things are needed: 1) small size, easily controlled around tight inside corners; 2) plunge base; and 3) base cutout for the PC-style bushings. The Marvel kit seems to meet the first two requirements.
Is there any chance that a plunge base with the PC bushing cutout could be made available? A clear base would be preferred, but not essential.