Hello, this is Kevin Contos-I do the web page and some sculpting for Lance and Laser. I discovered your forum this morning when hits from this thread started showing up on our site tracker.
I am quite pleased with ProCreate. The hardest thing to get used to is that it is easier to use. PSI Kneadatite, aka "Duro" and greenstuff, was not really designed for detail sculpting- it is a generally adhesive and filler formulated to be sticky to adhere well and have enough working time to smooth or blend it into a gap. I usually would blend it with about 25% of their brown putty to lessen the memory effect and stiffen the detail. The folks at PSI :
http://tinyurl.com/yejqtr
have always been helpful and generous with the sculpting and craft community, however, their main business is geared more towards industrial and hardware applications.
ProCreate is designed for detail sculpting-it has a much longer practical working time, blends well, and the color is much easier on the eyes. Per weight, it costs about the same as the greenstuff, but there is a lot less waste due to the separate packaging and longer working time. A little goes a long way, and if you snip off a pea-sized piece of each component, you'll have more than enough to work with for most detail applications.
I am happy to have found your forum, it looks like a great resource that I will enjoy exploring. As I do not want to appear to be too much of a shill for Lance and Laser, you may also purchase ProCreate from the Kraftmark EBay store:
http://www.kraftmark.biz/
They also have a nice t-shirt with ProCreate emblazoned boldly across the front, which may get you slapped or make you some new friends, depending on where you wear it. Tim Mayer, the chemist and co-owner of Kraftmark, obviously has a sense of humor-
http://kraftcreation.blogspot.com/
Here's my Mini Sculptin' Link Page if you want to check it out:
http://tinyurl.com/2a2pan
as well as handy Javascript Scale Calculator
http://tinyurl.com/2fk4al