John,
One further comment re: replacement parts: Have you thought carefully about starting down this path?
The reason I ask is because once you do start, the sky very quickly becomes the limit! With that lovely new laid rope rigging thread, the blocks all of sudden look shoddy and clumsy, so you replace them, too, and so on and so forth.
Personally, I love to pimp my kit builds, either by making new parts from scratch or just improving parts myself, or by buying better quality replacement parts or materials when I find the furnished stuff too sub-par.
I have huge fun doing this, and find the end result much more enjoyable too, and therefore also find the money to be well spent.
The down side is of course exactly that: it costs money, which is why I started this post by asking if you have thought it all through properly …
Some builders get some of their greatest pleasure from (or make a virtue of a necessity by) doing the best job possible on the shoestringiest budget imaginable, and more power to them. That, however, does not suit me at all. It is not that enjoy spending as such, but I don't mind it, and I am a grown person earning my own money with which I'll do what I damn well please that floats my boat as long as it's within the confines of the law and general morals. And brother, does quality stuff float my boat?! Oh, aye … 
However, I am extremely loath to point other people in my own direction of travel, unless I am fully assured that they are consenting adults who (a) can afford it, (b) won't mind the cost too much but will take at least a corresponding amount of pleasure from the process and the result, and (c) have a mind of their own and will only take my advice if they actually agree with it.
If, after reading this, you are seriously interested in improvement by replacement, then I'd be very happy to point you in various directions, as long as I am sure you won't mind that this won't involve much shoestring.
Mattias
Edited By Banjoman on 26/01/2018 11:51:13
Edited By Banjoman on 26/01/2018 11:51:48
Edited By Banjoman on 26/01/2018 11:53:26