(TFT) Announcing myself and a question

[ErolB1@aol.com]

I'm Erol K. Bayburt. Some of you on this list already know me. 

I've been GMing TFT for a long time, but I've only now gotten around to 
subscribing to this list and putting some of my TFT/Etan stuff up on my web 
site: 

http://members.aol.com/erolb1/etan.html

Recently I've been working on rule revisions. I want to reduce the cost of 
gunpowder in Etan by half, and this lead me to butting my head, again, on the 
potion & magic item economics system. Thus the question:

Does anyone know how that works, in particular, how the figures for "cost of 
ingredients for new potions" (AW p36) and "cost of St and ingredients for 
lesser/greater magic items" were derived? Not to mention the rental vs 
purchase cost for labs, and the footnotes for increasing the value of an 
underlying item when putting on a many-week enchantment. 

As nearly as I can figure, it's based on a *very* high interest rate - 1 or 
2% per *week*. The "increase in value of underlying item" rule matches almost 
perfectly with a 1% per week, compounded, interest rate. But I haven't been 
able to reverse engineer the rest of it. 

Of course I'm going to be ripping the whole subsystem out, for my campaign, 
but I really like to know what it is I'm trashing. 

Erol K. Bayburt
Evil Genius for a Better Tomorrow
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