@ Hello Richard,
Here are some things to take in consideration.
At the time my Clem was offered to me here on RBWOB group over a year, I really and fully didn't take in consideration all the facts about sizing. I scratched my head and decided to go with the the flow. The seller said that it would fit me. I mostly trusted his words. Upon receiving photos of the bike from the seller, I could tell by the way the stem and seat post was set up that the bike was too large for him. He never openly shared with me as to why he was selling it nor did I ask. I was rather eager to find a bicycle that I could fall in love with again after many years.
Without arguments nor questions, I bought the Clem. After I put it all together, I rode it. Yes, I was higher up on the bike more so than other bikes I have owned. Self admittedly, the bike felt very large for me and it took some practice in mounting and dismounting. Over time, I have gotten use to it , like riding a horse.
If you look closely at my seat post in my picture of my bike, I do not have a lot of seat post showing. It almost nill, of which is an obvious indication that the bike is too big for me.
Before my ownership of my Clem, I rode a bike that fit me extraordinarily well with 700c wheels for near forty years.
So, if I had the opportunity to buy a 52cm frameset, I would most likely pass on doing so for the reason I have already expressed in my last post.
If you are absolutely comfortable with your 52cm Clem, don't change a thing. It's all about preference and what feels right.
If lived closer to one another, I would gladly offer you a ride on my Clem and I could ride your Clem.
Hope all this helps you.
Kim Hetzel.