Ldf vs uldf

[r_jones]

As far as a spoilboard is concerned, is there a big enough difference in vacuum between using LDF or ULDF? The LDF I can have delivered right to the shop at no charge the ULDF I have to go and get is the reason why I ask.

Thanks,
Ron

[toych]

I use LDF and a single Fien on a 4x8 table with 4 zones with no issues, of course ULDF sould allow more flow.