Wonder how those strings would work on my Oscar Schmidt acoustic bass uke?
The tension might be too high for the acoustic, since it will not have as sturdy a build compared to the solid-body models
The poly-rubber strings are super-low tension, maybe 11-15lbs PER STRING, whereas the steel strings would need to be AT LEAST double that tension in order to intonate even close to being able to play in tune, especially with a saddle parallel to the bridge, AND with still only about 5mm saddle width for any compensation adjustments.
On a solid-body instrument, such as what Mike has, it is built more like a full-scale electric bass, and all of the Rondo Hadean basses (both acoustic and solid-body) all have a truss rod to compensate for neck bow and string height/buzzing.
So the poly rubber strings maybe top out at 60 lbs for the whole set of 4, and the steel strings are likely over 100 lbs for the entire set, and nearly double the string tension is something I woul consider the danger zone for causing the instrument to collapse, at least there would probably be EXTREME dishing and bellying by the bridge, until the bridge rotation from the excessive tension either causes the neck joint to fail, or the top to be torn off, and since most of the acoustic uke basses are string-thru-bridge with a back access panel in the body for feeding the strings, you're not going to see the bridge fly off, but the other problems are a more involved and severe repair job.
If it were me, I'd not put the steel strings on an
acoustic uke bass UNLESS they were
made for it like the Kala roundwound, or the Pyramid roundwound sets, and these are made at the proper tension from what I read.
However, I will caution you to proceed at your own risk, and do your own research, as I am not the end-all-be-all for this info, and if you do put steel-uke-bass strings on an
acoustic model, I am not liable for damages...