Jipe

The problem of wobbling on the Birdy 3 was reported by a user I know who eventually bought an H&H adapter to replace the Litepro and didn't experience the same problem.

Now, on another bike without front suspension and with another head tube geometry, it might behave differently.

For remembrance, this type of Brompton bloc adapter was originally designed by Bikegang for the Birdy 3 who tested it extensively. Originally, it was not supposed to be commercialized but due to the high demand the design was transferred to H&H who is now manufacturing and commercializing it.

Schwinnsta

I doubt the problem is with the Litepro design. It may be that his was not on tight enough or out of spec. The designs are not that different. It is true that more cantilevered the more likely you are to feel a difference, but this what an inch or so more. That is not enough to make of a difference. The H&H is nicer, but it is double the price, too.