The stock piston looks to have a bit of a dish in the middle like they just extended the valve pockets across to the other side making like an inverted dome kind of thing. The Wiseco TL slugs seemed to measure a bit closer to the head maybe due to the pin location? Whatever the reason, it would take less machining on mine to get the squish down to around 1mm so the Wiseco's were a good move...and work great!!
Have you compared the Wiseco TL squish height to the JE's? I know the JE's offer quite a bit higher dome for maybe a full point more compression but I'm wondering if they require as much milling to set the squish? Will be interesting to read of your findings with the new DL jugs. Good work as always Mike!