Can't disagree really. Did it with 56312 last December, sadly at the back on the way north but happily at the front for Shap (



). Nice and scenic the S+C is, but it's a helluva drag! Might be better with a 2+8 HST with all the right stuff fitted, at least that way no matter which end you're at you've got the thrash!
Daimler is partly correct, the Marston cooler groups do contribute to the scream effect, but the Napier NA256 turbochargers form much of the scream. There were some also power cars also fitted with SA-084 turbochargers, however I couldn't tell you which ones they were and whether the scream effect was significantly different or not.
43034 is also correct, FGW did run the Valentas into the ground. The infamous S352 was worn out by the nefarious policy of the time. Should anyone want to know why I pick on this Valenta in particular, one can only suggest you watch S352 Uncut, a DVD sold by the 125 Group. The first time I was shown that, my jaw aimed straight for the floor! I've had monsterous performances out of Western Valentas, but that was better than all of them at the time. To this day I rank it in the top 5 Valentas I've had the privilege of enjoying, right up there with S155, S444 and S482.
Someone on page 2 of this thread suggested the OP will enjoy the preserved set(s) more than he does with the frequent sights of the mainline sets still in use. I would disagree, I enjoy seeing a HST in use wherever I go, with a trip on one still being something special. All the way to Birmingham on Tuesday this week I couldn't wait to get there and get on 1V54 for a spin to Bristol and back. All the way to Bristol I enjoyed the journey and looked forward to the end of the 45 minute visit as it was another HST back to Birmingham. Was such a shame to get off, I'd have happily stayed on to at least York (where I'd have wanted to bail for a GC set instead) or even Edinburgh!
As for the OP's opinion, I agree to an extent. For some time I've said that once the HSTs are finished on mainline work then my time bashing on the mainline is over. That's when preservation will suit me. I may well keep an interest in all that is on the mainline, but it wouldn't be the same.
Until then, however, making the most of what is left on the mainline is certainly the agenda. Still trying to clear every power car for at least a thousand miles, which is still proving to be a difficult job, but I'll be damned if I don't manage it. Alongside that is the plan to get a photo of every power car running, although which ones I still need for phot-age I don't know yet.
So to the OP, I say make the most of it now and you'll probably not be the only grumpy ol' enthusiast when the end comes for regular mainline HST work!