As another UK-based tester, fully support this! Also thinking of “going longer” in some races next year after two years of mainly 10s and 25s. Only really felt like I’d finally “dialled in” my position for aero/comfort 18 months into riding a TT bike - before then the thought of 100mile seemed impossible! +1 for the ISM saddle in helping that too…
On training in position: I think it’s highly individual. At first I thought I had a drop off between my road bike and TT bike FTP, but in reality it was as much overestimating my road bike FTP as anything. This season gone, i found that I could train mainly on my road bike indoors, and then still put the power out for a 25 mile TT in position once every week or two. Potentially targeting longer races though might mean this needs to change. What I’d say is I don’t think there’s one set rule for which bike to train on inside, it’s pretty individual.
In term’s of training with longer events in mind, I’m looking to do two long (>4hr) rides on the weekend where possible, and just increase the z2 volume inside. Doing one or two sweetspot ride a week focusing on progressing length of intervals, and finally doing some strength work off the bike (squats, core etc.). With no end in sight to lock down and little else to do, I’m going for volume as my main stimulus this winter, ideally looking to hit 14-15 hours a week.
My questions for other people: I’ve got a fairly basic Dolan Aria frameset, largely with pre-2010 style aero features, external cables etc. (also lucky to have access to a Zipp 808 and disc). I can’t realistically afford a new TT bike/frame anytime soon, but could probably spare a couple of hundred quid for some aero components. I think the front end is what could be most easily tidied up. Is an aero-specific brake worth it? Are there any recommendations for base bars/skis that are good value + would represent an upgrade in aero/comfort on my current set up?