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In terms of sleeves, I have the fliphole white, black, red (my favorite of the 3 yet it is looser so not for you), the meiki Maria, meiki Sarah, and 4 tenga 3Ds (module, polygon, pile, zen) though I had all 5 before I chucked the spiral out.The fliphole black is definitely tighter than the white and more stimulating. Compared to the Meikis the Meikis are tighter given they are zero diameter canals yet in a way they might not feel as tight since the Meikis will just expand with your junk and don't really have a max limit (unless placed in something like say the meiki push doll which make them clearly tighter) so they can appear to not be as tight while the flipholes have the case to limit max expansion and of course are a softer material than the black which can also make a toy not feel as tight even if it is. I like the black yet I prefer the Meikis to it given they are far more realistic and just feel better to me. I'd suggest looking at the Tenga 3D sleeves as to me they are superior to the flipholes and are a great bang for the buck. I think the Pile would probably be a good choice for you and you can easily squeeze them as much as you want to make them as tight as you want and the Pile design is very stimulating. The Module probably has the most noticeable texture yet it can be too stimulating at times for me while the Pile is close in texture yet doesn't over stimulate me.
Oh and flipholes are more durable since the material they use isn't as soft.