I write you as I see you actively post about EcoTrek. I am about to replace cells only in my two modules, as opposed to paying 14k to have La Mesa RV install L3 new batts. I have a mechanic who seems comfortable doing it. I'd love to hear your thoughts, and any actual cell product recommendations. I think I want 600Ah total, up from the two 200Ah revision A (custom built system on my 2017 Versatile).