[running lipos in parallel]

so im looking into power options for a dna 200 i am making and was wondering if any one hase tried running 2 or more lipo batteries in parallel? the only problem i can see is the ballence conecter and if hooking it up in parillel would mess with anything if the s3 lipos are both identicle and bran new

[looking for 3d printed pass-though case]

i hope i put this in the right place if not please move it to where it needs to be

im looking for a 3d print file for a sxmini stile box that will fit a dna200 for a pass-though rig if any one can point me in the right direction please do