Green stuff and lizardmen conversion questions

[MOMUS]

Hello modellers, painters and... terrainers?

I have a few questions i need answered.

I have a slann (oop) that want to convert, basically i want him to sit on the rock and the rock will float above the base. I have the rock, flying stand and base thats should be the easy bit.
However, he has no feet and i dont have the right hand holding the staff. For this i was going to sculpt it out of green stuff. Not used green stuff before but im fairly adept at arty stuff, to make things easier on myself i will sculpt the arm so it sits across his lap (basically like the other arm).

Am i better off making an arm-shaped blob and sticking it on and then fine sculpting it or just attach green stuff to the model and slowly sculpt it taking away small bits at a time?

Also i have a few old style saurus and cold ones going spare and though of making some saurus cav. I remember a tutorial of sorts appearing in an old WD, does anyone have a link to it?


Any tips in general on GS would also be appreciated.