Looking for a 'cost benefit analysis' on whether to use TBR or SBR supported rails and bearings for our new (MK3) 8'x4' gantry router. Would appreciate comments or a pointer to such a discussion. (Our MK2 machine used TBR - which we are very pleased with apart from what it cost.)

New machine will be used for routing hardwood and MDF.

Thanks in advance.

Karl