Don't get rid of the 138S. Get a larger camera.

I use a Saunders 4550XLG/VCCE enlarger for 4x5", 6x7cm and 35mm.
I use the 138S for 8x10" enlarging and 7x17" contact printing. See my gallery for two shots of the 138S with an Aristo 12x12 cold light head and 8x10 negative holder.

John Powers