Just bought 3 pairs more after noticing they're being discontinued
thanks for speedy reply - that does help me rule out the sram one - as that has recessed mounts ( intriguingly the linked instruction pdf suggests this model accommodates all of sram, microshift, shimano - https://www.paulcomp.com/wp-content/uploads/2019/04/thumbie_2019.pdf however that cant be the case as the latter two require a raised square mount. Ho hum I think its the shimano variant I need for the dia compe levers .