hi everyone, so i will be performing a BLAB extraction tek for my first extraction..and so i need some suggestions and advice

So i just ordered a bunch of required materials from online for this tek:
50g MHRB powdered (Jimjam shop)
fumaric acid (FV)
Red devil lye
Limo (greenterpene)
IPA 99%
pau d'arco
freakin $80 worth of stuff

...went kinda over my price range lol. but it will pay off
could someone please help me with some questions:
1)since MHRB is being imported from Europe to US you think customs will be a problem?...i hope not
2)since i will only be using 50gm of MHRB (11% of the actual amount used for BLAB- 450gm), should i just use 11% of all the materials in BLAB tek for my extraction such as lye, FASI, Limo, etc.?? ...just want to make sure i don't screw up although it seems pretty straightforward.
3)this tek will yield jimjam spice and i'm planning to blend it with enhanced leaf (3:2 ratio -Pau D'Arco: DMT. any suggestions on this?). do you think jimjam spice enhanced leaf will be better or pure freebase dmt enhanced leaf? or is there not much difference between the two?
4)should i buy a pH meter or litmus papers? (i was considering litmus since it will be cheaper)
all my stuff should get to me by 1-2 weeks. as soon as i have my supplies, i'll get on it right away but just needed certain clarifications beforehand. thank you dear friends in advance

I LOVE NEXUS!!!
"I'm not trying to give you a spiritual teaching, I just want to cut your head off" ~Adyashanti
"It is necessary for us to be free of our need for freedom, to be enlightened from our need for enlightenment" ~Adyashanti