Thanks for all of your responses. Presently, I have 2 LPL (Omega/Saunders) 4x5 diffusion enlargers that I use with the VCCE module specific for B&W.

I enlarge from a minimum of 8x10 (rare) to 11x14 (usual) to 16x20 (rare) using FB multi-grade papers (Ilford MGIV, ADOX MCC) or lith using Fomatone.