[warning - contains graphic descriptions of traumatic bike death that may upset some readers]
Took the Eclipse up the TPT today on its 25mm. It felt a bit odd ridewise but I'd not ridden it for a couple of weeks so put it down to that; this bike has a tendency for the headset to loosen but it wasn't the case this time. Had to carry it over a muddy bit but it rode well on the very slight downhill , 18-20mph. It was when I stopped to clean some mud from under the mudguard that I noticed [those of a sensitive disposition turn away now] that the seat tube had parted company with the bottom bracket housing.
I nursed it the rest of the way (10 miles) - it felt a bit like a cheap full sus from Argos*, with the "give" definitely wasting some power
It's probably rusted through from inside; this is a thirty year old frame. I fear I can't really justify throwing the money into having it welded back on, given that it's not in great condition (it was like that when I got it sir!) anyway. I'd only recently put new bar tape on as well. I shall rescue the wheels (bargain basement but wheels nonetheless; the rear'd be good for the Turbo and the front will probably end up as a spoke doner) and the shifters (anyone want a 2x8 Claris Road brifter set? Cheap? - or I may keep them in case I end up doing a flat to drop conversion on something)
So that's that really.
*But still a better ride with a broken frame than a cheap full sus from Argos