I think that Emil's deluxe fuel system fixes all the issues with the standard set up. A very similar result can be achieved with some off the shelf items for those that don't trust the postal service. There are two articles in the MTWC Bulletin magazine with an explanation on how the system operates, upgrades and inline fuel filters for the M3W, in January and July 2021 issues, available to club members online as well. https://www.mtwc.co.uk/full-list-of-articles/