Well they're perfectly true but I'm told the recommended upper end spoke tension for DS is around 160kgf and the spokes are actually spinning at the nipple/end of the thread if they try to go any higher, currently around the 135kgf, which is mid-range.
Queried if it's a case of needing new spokes or if it's just an inherent limit with this particular wheel. Was told the latter but as always would value your input
Suggested I check the skewer is sufficiently tight (I never run mine loose, I'm paranoid) and that the caliper is centered over the wheel, which it is. Will ride on them again this evening and see if the slight increase in tension they managed helps at all.