hm..lets see.
chidori and frs are similar jutsus.in both case you must concentrate your chakra in your hand and in both cases the chakra is visible!
so....
rasengan+wind typed manipulation=frs
rasengan+lightning typed manipulation=chidori?
(kakashi can make rasengan as we know and he was tought it by his sensei minato so its quite possible!)
chidori and frs are similar jutsus.in both case you must concentrate your chakra in your hand and in both cases the chakra is visible!
so....
rasengan+wind typed manipulation=frs
rasengan+lightning typed manipulation=chidori?
(kakashi can make rasengan as we know and he was tought it by his sensei minato so its quite possible!)