Is there any advantage to be gained by using the appropriate box? I have 4x5, 6x7 and 35mm, but on advice from someone on this list who had used the Ilford MG head in a professional lab (ie not enough time to fart about changing boxes) I use the 4x5 most of the time for all gauges.

My only thought is that if I were to burn out the 4x5 I may not be able to use the 6x7, nor the 35mm boxes for 4x5 printing and as has been posted, they are rare.

Regards - Ross