Assuming they're Dapol (i.e. N scale) how close is your etch to true 2mm scale on the wheel spacings?
They are not close to 2mm scale. The etches are specifically designed to convert the proprietory bodies. That means they all have exact wheel spacings for 1:148 (except for the 4F which is a conversion chassis for the Raithby etched kit, so it is to 2FS). It also means they have strange cutouts where the boby mouldingd have bits sticking out. So they are not intene
ded to be generic chassis for uses other that for which they are designed.
I have has a couple of queries about doing 2mm equivalants, that might be possible given I have the artwork to rescale, but the cost of these would be higher than the conversion chassis.