Figures! Figures! Tell us more noble Sir.
Will they scale with the perfectly sized foundry, ironclad et al or be more in line with the diminuative 1889 range?
They're not diminuative! They lack glandular deficiency caused chimeric gigantism!

Have both, play with both, agree oft best not on the same table. That said, I think, should the images not be amiss, the Ironclad scaled better with the 1889 figs than I suspect it will with Foundry figs. I thought a tight fit for one of the Brits shown, actually.
Awaiting reviews! Breath bated!
Doug