By a weird twist of fate.. to within 1 hour exactly 1 year since the 2022 trip, I set off with "M" again up Snowdon.
This time, the carts had brakes on both the front and back wheels (unlike just back brakes on previous attempt)
Unfortunately, the grease they spread on the tracks again got into the brakes which didn't work effectively as needed and the steeper upper sections were again a desperate battle for survival (serious, no melodramatic exaggeration) .
Given up on Snowdon as a "luge" track, the braking is too problematic, unless you can use the rack somehow? But we'd just got back from a different venue (to be a future report) that was abso-F-lutely brilliant and very very fast cart track
As an update to this old thread, here's a clip from the lower section of the Snowdon railway (2023 trip), at sunset after all trains had gone to depot. Not super fast as brake problems mentioned. Enjoy...