This is directed at Kebba but can be answered by anyone. I noticed that you are doing SFS in season? and I wondered how your athletes handle the change in speeds in season. I have had a prior conversation with UT about this and since moved away SFS and use them sparingly due to the CNS demand. I typically will do about 3-4 sessions a year now.
With my athletes I’ll use it all through indoor. Once outdoor begins I usually scrap it though. This has worked well for me and mine.