Well, I am going to have to correct myself. I paid particular attention to the handle today. I had no issues with a slippery hold until I got to the ATG pass. I did notice the handle started to slip in my hand and I had to readjust my grip. So, I stand corrected, there is a bit of an issue with the handle being slippery, especially if you hold it on the non-dimpled part.Had my second shave and conclude that the pro supers are better on the Spirit. Also, how are you guys getting along with the handle? It's the most slipperiest handle I have and the only one where I need the alum for help. Being a handle-heavy razor doesn't help.
Also, I found that the Feather Super Pro was not as kind on the 4th use as it was on the 1st. I will try the Feather Pro tomorrow and hope for a better result than I got today.