Thanks. My problem is that I need to move the location of the roller wheels and the H&H has no place where I could drill. Also the top of the original Brompton rack seems strong enough, maybe even too strong for what it needs to be. On the other hand the stays are feeble. I looked at the strength of tubes from various materials and it seems that stainless steel brings practically no gain in strength for reasonable parameters compared to alu, just gain in weight. However, titanium brings advantage and I ordered titanium tubes for the stays. Incidentally, with shipping there is practically no difference in cost when varying tube material
. With this I am going half way towards a titanium rack
.
I had twice stay failures with stock aluminum racks. The small tubes are also unreasonably priced. That's why I changed to titanium. I also replaced the easy wheels with something more practical. I'm looking forwards to see how the helix rolls on its own big wheel.