I found the 1" thick thermostatic sandwich plate offset the oil filter too far beneath the car for comfort (even with an extra short filter). This led me to order a Raceline.co.uk straight oil filter adapter. I picked it up from the post-office and installed it this morning and am very pleased thus far. The filter no longer extends beneath the chassis and is just above the diagonal frame member in the picture below.
Last week I added upper supports to the radiator to secure the oil cooler.
With sunny weather forecast for Friday I hope to test out my winter projects.