Any possbility of including the tunneling team in Mossino? I dont have the Vraks 2 book yet (i know, i know

) so I dont know exactly how they function/attach in 40k but heres my thoughts:
Im thinking a penny sized round base 2-3 models to represent OR a standard infantry base.  Either with modelled drill team.
two ways to use them:
1. Tunnelers - just like the rules, but instead of "transporting", they can pick a fortification and "breaktrough" with a company/grenadier/infantry platoon.  In this case they are a 0-1 add-on/upgrade to the entry sort of like the way centaurs are but can only tunnel to a fortification (enemy only??).  Possibly destroying/breaching a section when arriving (must have modeled destroyed fort. marker).
OR
2. A 0-1 infantry unit/team with Scout and Infiltrate, attached to a company/grenadier/infantry platoon, that can destroy a section of fortication via a charge with a 4+ or something.  If they are successful against the fortification, then a breach is formed on that section (must have appropriate destroyed fort. marker).  If the assault fails, possibly have a bad effect for the unit they were an upgrade for.  Again as an upgrade that is removed once it is used.  If used it no longer counts towards company strength.  If killed before use, it counts where appropriate.
I think an upgrade for a company is a bit much, but I like the idea for an infantry platoon or best of all grenadiers. Seems fitting.
Any thoughts?