Many years ago I had an MFS 400 and a pair of 700mm extrusions, but sold it when offered the right price. I have been kicking myself ever since. There are several projects coming up where the MFS would get used extensively. I ordered Woodpeckers VRJ over the weekend and am looking forward to it. The double connectors seem like a substantial improvement over the single one on the MFS. I went with the 18"X18" version along with 2 48" extrusions. Hopefully the 18" sections can be joined together to make a larger system when combined with the 48" extrusions. I am sure I can fabricate some connectors to do the job. The 18" set seemed to be a better size for most uses. The set can then be expanded when needed. This time I will not be selling it because shop made single use jigs are a waste of valuable time that is better spent elsewhere, that is how the expense is justified.