Sorry about the delay in getting back to you, just had to trek across to the other side of the country for eldest son's university graduation.
The VTC is what you do when GW drops Warhammer Fantasy ,replacing it with a different system leaving you with shed loads of renaissance and renaissance fantasy figures. So rather than rebuild and play Warhammer 1K. I decided to go down the route of using these figures for a Renaissance fantasy set against the backdrop of the Italian Wars. We have replaced magic with science as science is the magicof the renaissance.
After looking around for a set of warGAME rules not a simulation I came across: Condottiere by Frank Chadwick sold by Foundry.
They have their faults , it was definately Frank on a Friday afternoon or very poor editing , errors, omissions and enough holes to charge a unit of Gendarmes through, just what I was looking for . My sons love the fate deck and have great fun in thwarting dad's grand plan by zapping me with one of the cards.
So in essence it's more Da Vinci's Demons than George Gush ( whose rules inspired me in my 20's).
It is set in around the early 1520s it's pre Pavia , we have both fictitious and historical characters mixed in , although we play fast and loose with the historicals as some should really be long dead by then.