put thin psa abrasive on the blade, lay it in place, affix the lever cap on and work the adjuster and see where it marks.
The only block plane that I have is a stanley 18. It will plane bubinga like nothing as long as the iron is set up with geometry that doesn't fold (actually, I"ll go one further - it will plane cocobolo with silica and 1.1SG density bone stock other than flattening the sole - which i did need for that kind of work.
But it's a little older and reasonably well made, and I"m sure the lever cap can flex the iron a little to bed it.
I'm going to assume that just as is the case with bench planes, most of the work done on block planes is solving a problem other than what's there.