One of the things that has positively been hurting inside is that the efflux from each lift propeller is inhibited to some extent by its encounter with the topside of the ski.
I devised all sorts of workarounds for the skis themselves before realising that the most elegant solution was simply a deflector to direct the efflux largely clear of that surface. Whilst you can get 3-D modelling apps to visualise the airflow, I've always found it easier and healthier to walk around to the timber yard for a look-see.
This is a length of uPVC extrusion used for I don't know what, but will work here as required once a second length is fitted to the other side too.
P.S. I bottled out of reducing the struts from 16" to 12" because as no rabbi will ever admit, you can take it off but you can't put it back on; now they're 350mm (or 14") and set to remain so.
