Thanks for all of the help. I have been flying a Hangar 9 B-25 for 4 years on OS 46 glows and now I am building the ESM B-25 with DLE 20s. I asked this question because I will need additional nose weight and it would be nice to be able to install the battery for the ignitions in the nose with ample mAh to run 2 ignitions. I am installing a Smartfly 10 Power Expander with dual batteries and wanted to use a third for the ignitions. I will have a fourth battery for the Wingspan bomb drop so I should have plenty of nose weight. I am waiting to see how much weight is needed for balance before I start purchasing batteries.