"... Do u think it's safe. ..." IMHO only if you don't mind dying.
You are making and working with a friggin BOMB with LOTS of shrapnel. Remember that and you will have a better chance at staying alive. If you are going to open blast, please buy and work with quality SS tubes.
These are my rigs both are closed loop. Still a very LARGE bomb but safer than open blasting. I have moved on to other ways to create snappable shatter. I was able to do it successfully but the risk was WAY too high.
Frankie (the small one) is good for a qp. Frankie II is for up to a pound. (filter stack is not attached nor is the material column with slurry jacket.)
for open blasting, your minimum needs are the frozen tube on the far right. with that tube alone you can empty the can at the top leaving the valve at the bottom cracked. That tube is a 1.5 in x 18in tube about $100 the rest of the parts about another $40 depending on the quality parts purchased. I purchased all parts from BVV and their tech support was most helpful. With that tube you will be as safe as you can be with open blasting and it is reusable and reliable.
For ultimate safety in BHO processing, closed-loop is the only way to go IMHO.
Be Safe and Happy Tokin'
p.s. the tube on the right will level your house and anyone in it; the one on the right? your house, the house on either side and probably the one in the back (if you live in the city). just sayin'
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