Open set up. Confederates on left, Hay's Brigade). The deployment was done using cards with 50% blanks. The Confederates were pretty evenly spread out whilst the Union forces (1st Brigade III Corps) were heavy on the left and light on the right and centre.
The Union advance on the left
The Confederates occupy the woods to their right and advance across the rest of the field. Some cannon fire started to inflict light casulaties on both sides
Firefights between the 5th Louisiana (in woods) and the 68th Penn (bottom) and the 8th Louisiana (on hill)and the 141st Penn (topin woods). Whilst the 114th Penn (Veteran Zouaves) and 57th Penn advance into the gap. These 2 firefights were to be decisive. The 68th Penn routed the 5th Louisiana with better shooting. The 8th Louisiana suffered a devastating volley from the 141st, losing 1/3 strength in a single round.
The 114th took advantage and charged them from the hill. With 2 routing units in front of them the entire Union flank advanced and drove the other 2 units opposing them from the field. The photography now packed up but with 50% of their army routed and a stuttering advance of their other flank the victory of the Union was assured.
Overall the rules worked nicely and they evolved through the battle. I do need more troops though, about 4 more regiments per side and a couple more cannon batteries.
I have reposted the tweaked rules above.