Don't know the Flying Dutchman, thus no possible comment.

Have known the owner of Then & Now for more than 40 years.

He has done several items for me including designing and building a custom fuel pump for a special application.

Highest possible recommendation !

Jon

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop