I'd be more concerned about the extra length of full wrapping the Höfner and Pyramid Gold flatwounds (which are said to be identical to Höfner-branded flats) have right before those thin ends (the Pyramids at least have 33.5" total, measured from the other end, vs. the 32"-odd that most short-scale strings have and most s-s basses need), and which may cause breaking if wound on the tuning post. Now, they may fit anyway if the total distance, ball-anchoring to first tuner, is >33.5" (which can only be verified on the specific instrument, by measuring), and they may not break even if not, provided the string is flexible enough (which can only be verified by trying, and praying).
I've posted a number of times about the two Rotosound .09" low E strings I tried (so keep in mind it's mostly the same guy discussing them!), and I for one cannot recommend that string at least.
As Root said, it's much smoother than how its long-scale counterpart is described as being, which in turn I have no direct experience of (it was noted by others too and corroborated with pics; comments also pointed out the "rough" strings in Roto flatwound sets are the lowest ones: the G and D are smoother). Timbre-wise it's not at all bright-sounding, even when new, unlike the long-scale are usually reported to be. My main gripe with it was that it behaved exactly as I described above: it had very unstable pitch on the attack, which I attributed to it being at the same time loose, as a .09 low E at 30" scale will be, and stiff, which was easily confirmed in comparison to another flat - in my case Pyramid, Fender, Thomastik-Infeld - at replacement, with both uninstalled: the Roto was perceptibly less pliable (it was more resistant to coiling).
So here's my humble report on the Roto short-scale low E. Your mileage may vary of course.
A Euro link of the GHS set I mentioned above, just in case:
GHS 3020 L Light Precision Flatwound (Short Scale 30", 31") jetzt online kaufen bei SchneiderMusik.de