Ive ordered the DL-4 Mod from R3FX. I was pleased with the quality but it was shipped to me with defect after about 2-3 weeks of waiting. The unit was sent back within a week, and once I sent him an email on when I should be getting my unit back, he replied saying he was out of town until friday.
In summation, the quality is good but beware of defect in the finished product and untimely customer service. Just not worth it in my opinion