I installed a Facnor FD 230 on my boat in May.
- The flat deck furling drum is lower than standard drums so I get a larger luff length.
- Using webbing on the drum give more leverage when furling (especially at the start of when furling in).
- You can't get overrides on the drum with webbing
- There is room for a turnbuckle inside the furling drum, so it is possible the have one installed an still get the drum low.
I installed it myself, easy - just follow the book
it's note easy to spot but the turbuckle sits inside here.
To adjust you must remove two screws and slide the furling drum up to get access to the turnbuckle.