No you have gone and done it. Yes, looking at it, it is probably better to put in a new floor. than trying to fabricate ridged patch panels I have asked José Franssen for a price and I have the CAS prices already (the Franssen one includes the 3 V sections).
What is the fastening kit you mentioned ❓ .
I am assuming the floor is spot welded in place and I need to drill these out, or is the fastening kit something else. ❓