I found this while doing some research:
https://www.youtube.com/watch?v=dCmY_HxrqWs
I haven't tried it at the gym with bigger weights yet, but just from trying a few sets at home with small weights I am really feeling it in my upper pecs. I am amazed at how much its working, and I think for people like me who have bad shoulders it may be a good alternative that you can do without the strain of incline press or incline fly's.
I also found this:
https://www.bing.com/videos/search?q=guillotine+press&view=detail&mid=A699E6CAD011C7DF03F8A699E6CAD011C7DF03F8&FORM=VIRE
this is the guillotine press that showed more muscle activation of the entire chest than any other chest exercise on the tnation chest page found here:
https://www.t-nation.com/training/inside-the-muscles-best-chest-and-triceps-exercises
I also found a lil bit different version that was compared to the guillotine press here:
https://www.youtube.com/watch?v=ebOots24nKA
Besides figured we can always use another weapon in our barrel chest arsenal, let me know what you guys think!