Hey Thomas/Merwan!
Thanks for inviting me Transmutr it works great, fast and was a much needed tool!
I found the bug with the stool i sent via email, what i did to replicate it was playing with the axis options, i clicked several times different -Z +Y -Y and found that after playing with them it´s when transmutr exports it with an incorrect insertion point.
If this is done correctly the first time no such problem happens.
Cheers.
Jc.