Bottleneck, and my 31 character limit. Ideas?

[InfDoleo]

insert character 'K' at postition 1?

Nope, the opposite, insert character '1' at position 'K'

For positions over 9, use A-Z, for a total of 36 possible positions

... and when that happens the password will be longer than 31 characters ...

Right. The maximum support length is 32 anyway and you will be unable to crack this anymore. See here for details:

https://hashcat.net/wiki/doku.php?id=fre...ord_length

Well shit! I thought by using attack mode 3 (like you did with this) it bypasses the 31 character limit?

I'm almost done my slightly modified version of the script and will test it and see.