Alchemy risks

[Atsuten]

I've read the posts and stickies on how to do alchemy, but I'm confused as to what the risks are.
Specifically, I'm afraid of:
1) my SOS weapon being destroyed (and losing more than 1 mil gold)
2) my 19 block rate shield being reduced because I tried to add Str, Freeze, or +1,2

While I'm asking, has anyone tried to change their block rate using tablets? How did it work out for you? Do you use lucky powders with tablets?

[Orotiagito]

I'm pretty sure that using an Elixer on an item over +4 is the only way that it can be destroyed....might be +5. "Immortal" on your Item will prevent this from happening.

Any failed Elixer will erase any + and set it back to zero. "Astral" on your item will prevent a full reset.

Other risks come from "Attribute Assimilation" on stones. 10% is the lowest chance that Attribute Assimilation will occur, but special stones automatically have 0% (Astral, Steady). A 30% Attribute Assimilation is the highest chance.

Attribute Assimilation means that theres a % chance that after having a successful alchemy, another stat could be reset. Example - I used a Disipline Stone on my Lv 24 SOS Shield, It worked and I got 9 Critical, but My Block Ratio went from 17 -> 15

Also, you could get the "Maximum durability reduced" where its basically the reverse of a master stone and can not be fixed. "Steady" on your Item will prevent this from happening.