Been super busy lately but finally got a chance to try the
Medium Size (Red) SpinFit TwinBlade CP240-M ear tips with the N5005 that others suggested, including Jude in Post #455. Don't know why I didn't try these sooner...too many tips to choose from and try, I guess.
https://www.amazon.com/gp/product/B06VVRXHG1/
These Medium size double-flange Spinfit TwinBlades do sound very, very good, and are a bit more comfortable than the Sony tips (best sound), but I think the Sony's are still my favorite sound-wise. I've been using the Reference Filters with both of these. I'll try the Spinfits with both the Mid-High Boost & Bass Boost filters next, but I think these will swing too far in their respective directions (for me). We'll see (or hear)!
Unfortunately, none of the TS/TSX Comply Foam Tip sizes work well for me, for either comfort or a balanced sound. I mentioned it before, but I think that the N5005 nozzles are just too large of a diameter for my ear canals.
Once the nozzle and basically any tip are inserted so that the IEM bodies seat well and comfortably + secure in my outer ear, the inner nozzle tips press uncomfortably on my inner ear canal and any tip that's used becomes somewhat hard because it is super compressed against my ear canal.
In addition (also mentioned previously), for my ears & ear canals, the nozzles on the N5005 need to be angled just a bit more forward and also up, i.e. pointed up & out more towards the outer corner of each eye.
For instance, when I push in & down slightly on the bottom rear of the IEM bodies with my fingers so the nozzles are aimed up a bit and more parallel to the sides of my head, I get a PERFECT seal and the IEM bodies also fit perfectly in my outer ear. Hopefully this is just unique to my head and weird ears!
I might just go for the Snug Fit custom-molded inserts even though they are quite expensive, because now that I've heard what the N5005 are truly capable of (reference quality IMO), I don't want to give them up.
I also tried the Smaller of the two TRIPLE-Flange tips that come in the 3rd party replacement set for the Monster Turbine Pro....
https://www.amazon.com/gp/product/B00FNXC18S/
I ended up cutting about 1/8" of length off of the rear silicone tube (behind & under the largest 3rd flange) so that only about 1.5mm of the rear silicone tube is left, and then slid these tips all of the way onto the N5005's nozzles at the inside ridge where the tips should normally seat. In this position, the largest, rear silicone flange kind of encompasses or wraps around part of the main IEM body, but doesn't obstruct the small port hole there. This adds additional seal and isolation at my outer ear. The small end of the tips still hang over the end of the nozzles a bit, and this keeps a good seal in my inner ear canal without having the actual nozzle press too hard there, as with most other tips.
These modified tips sound very, very good as well, and out of all of the tips that I've tried, these are the Most Comfortable along with providing the Best Overall Seal and allowing the main IEM body to sit securely in my outer ear to keep the IEMs in place.
But IMO, the Medium size Single-Flange 3rd party SONY replacement tips in either white or black with the teal/green bore tube still sound THE BEST by just a small margin....Again using the Reference Filters...I've tried all of the other filters with these tips and the Reference ones are spot-on for me.
However, the Sony tips are not the most comfortable (for me), nor do they provide the best seal & isolation, hence my quest for other tips.
https://www.amazon.com/Sony-EPEX10A-WHI-Discontinued-Manufacturer/dp/B001RB24V4/
Anyway, just sharing my experience just in case anyone else is also on the hunt for other tips.