Gentlemen, thank You for the input so far!
Damascus- I get the feeling that You "have been around" and treaded the same paths that I already have entered or are about to enter. That makes Your contribution even more valuable to me- thank You.
Yes..the search for the "holy grail" of Slacums is a tedious one and if not proper precautions are taken one might end up crazy on Your "grail quest".
The quest is probably- as You already said- unobtainable and for me I will suffice with a functional Slacum which I will certainly obtain with the use of the recipes already mentioned above.
But I am also curios by nature and it is always nice to get a deeper knowledge of why things work and how they work. I probably need some more knowledge of the basic chemistry that You have to master, and therefore I might sometimes lack the proper perspective how things work together and their effect on the end result.
I find what You wrote about lac, resin, gum and carriers is very interesting- The carriers (oil and turp?) carry the lac, gum or resin into the wood and let them set there while evaporating?
Regarding the Venice Turp I checked with some friends who are in the horse business- they do not use this (could not find it in any of the local horse equipment shops either)so I took the short route and went to the artist store, but I will keep my eyes open in the future when among horse people.
I will also check out my Asian market for Toad legs

May I ask if You put canuba wax in Your Slacum from the beginning? I am pondering about if it will hinder the penetration of oil if added early on (have not used wax in my Slacums before)
Ken, thank You for the input which I found very interesting especially what You wrote about copal ad the link to the old book.
You both also put Your finger on the key of success- application which in turn –based on my own experience- have three main components- Time, patience and thiiiin layers…
I will try to add a couple of pics to the thread on one of my older projects- but i cant seem to find out to add pics- the file manager button...
Erland