Text on condensed staves

It seems that identical strings of Ctrl-X text aren’t consolidated when staves are condensed:
I go to Galley view and locally hide all but one of the strings for each occurrence, which works, but is it the best/quickest way?

If you create this as a custom playing technique, and add it to both instruments, is that correctly consolidated on the condensed staff?

I have to say I thought of that, but didn’t try it, as my score is rather peppered with quasi-random text strings (e.g. ‘shorten semibreves slightly ad lib.’), and I reckoned it would be quicker to go the hide route than to create custom techniques for each individually.