Have SC-27 and will be buying UL-1 soon. Have yet to buy a lipo but am looking to buy 4 of the 2s lipo's. Spec Point Concepts has SPC 2s/20c/5000mah soft packs for 50.00 each. Anyone heard of this brand. He tells me many packs that claim 25c or 30c are really only 20c where his packs are an actual 20c. I want good packs. Is there a better buy out there and would these size packs have enough power to really move an SV-27 because I'm use to using 7-cell nimh packs.