I have an assortment of batteries that I'd love to run in my MT410 and my SCT410.3. However, they just can't squeeze in. The 148mm is just shy of what i need (155ish mm). Are there any options for longer battery trays? Or is the only option to file down the rear lip in the battery tray? If so, are there any downside to filing that down (plastic tray is weaker or something)?