First, thanks for the replies! Just another reason I am loving it here in Sufferlandria.
So, as for workouts, earlier this summer, I did two, two week general training plans on Zwift (sorry, trialed it on recommendation), then moved to Sufferfest and completed Full Frontal/Half Monty (4DP results = 392/198/164/132). Since, I was only able to complete one+ week each of All-Purpose Road and Building Blocks training plans, along with a number of individual workouts based on the 4DP result recommendations. I also ride outside, mostly on local hilly 15 mile loops, but also some longer 20-30 mile outings. I also ride virtually between workouts and outdoor rides on Rouvy to mix things up. My current 4DP results after riding yesterday, with no associated preparation beyond a number of recent outdoor great feeling rides and two days off to rest before are as follows… 4DP=711/244/155/126. So my short efforts are way up, but longer efforts are down from comparatively very low performance.
I agree pre- and post- prep are critical for me due to digestive issues, but was very surprised not to see longer effort power going down so far.
I will inquire about custom training plans, for sure.
Thanks again for any words of wisdom.