Thanks again for your knowledgeable input you're right I almost jumped on that deal.
If anyone is going with gels, get the Ditzler Photo gels instead. The tab design allows the gels to be handled without getting fingerprints on the area of the gel that covers the camera lens. Tabless gels are hard to handle (I've tried them).
Having reviewed the Ditzler system, I am sold, and just bought a kit! Thanks for the recommendation! Being able to leave the original filter in place is huge! The lens filter screw threads are very delicate, and definitely not designed for daily use/abuse that swapping filters during lighting changes requires!
I can even use the Dizler plastic ring with my existing gels that I bought to go inside the stock UV fliter, which include a polarizer filter! 
Exactly. I bought the triple pack for spares. I don't expect to use them very often, but the ease of use will certainly encourage more experimentation using them. If I get serious and see a real benefit, I'll pick up one of the glass filters that also mount over the existing filter. Thanks again. I wouldn't have found these otherwise!
Yeah, received my 3 pack last Friday. After trying them out in a few scenarios, I noticed that the first two filters don't really help much on really bright days. (Miami). So now I'm returning them to Amazon and was going to either go for the Cinema Series 3 pack (8/PL 16/PL 32/PL) or this6 pack.
The plastic gels are also stackable with no increase in weight, and while fragile, the gels are dirt cheap to replace, once you have the mounting mechanism. With three external plastic mounts included in the $35 package above, you never have to handle the filters, once you decide which three you want to keep in them, and they are removable in a second to install the stock plastic gimbal protector, and they come in a small metal tin to protect them. You can also combine a polarizer gel with any of them, too. Quality gels can be purchased in sheets and cut to size, if you are needing to replace them more frequently.
