When I started my registry sets, the NGC only coin rule, had already gone into effect. I had many coins in all types of plastic. Mostly, NGC and PCGS. I have two registry sets that I concentrate on the most. One here on NGC and one at PCGS. Most likely I won't finish the PCGS 7070 type set. One of the Seated Liberty quarter slots I need to fill, in PCGS plastic, I already own in NGC plastic. I didn't get the coin in a back alley deal. It cost some money and dumping more money to get it in another plastic holder is out of the question. Plus I like the quarter and the NGC plastic. I have other examples like that in my collection. I am sure others have faced the same dilemma. That is one problem, in building a registry set, when you want to buy the coin and not the holder.
The set I am building at NGC I own duplicate coins. As in, I have the same coin in NGC plastic as I do in PCGS plastic. The coins in my NGC registry set are common coins. The duplicates came about because it was cheaper to buy another graded coin than cross to another service. So I have two coins of some dates and mints. After experiencing these two problems with registry set building the newness wore off quick. I can understand the frustration if someone had built a collection on hunting the best coin for that registry set slot only to have it taken away. Although, I can't find fault with either NGC or PCGS wanting only their plastic in the registry sets to rep their brand. My solution? To keep collecting the coins I like in whatever plastic or raw that floats my boat.
While, I like to compete with the next guy, the registry for me was more of a fun thing. The set I am working on here is 340 coins large. I can still see remnants of some great sets prior to the NGC only sets. Those sets far surpass what I have amassed in mine. I still enjoy building the set, but, it would be a lot more fun if all the participants were still there. I only have 20% of my set complete, yet, it is in the TOP20 of about 160 participants. When I add a coin I just leap over folks that are no longer participating. Yet, those same people had some awesome collections. I just wanted to say thanks for letting little old me slide into the TOP20. It won't take much now to capture one of those little blue ribbons.