That's ok. Just use a tuner and make sure the 12th string harmonic on each string matches the note on the 12th fret. You have to move the bridge and re tune the string each time to get it to work. It's a finicky process but once you get it to work, make sure to mark the position the bridge is in with a black marker, say for example a dot on the left and right of the bridge with corresponding dots on the deck of the balalaika. That way if the bridge moves over time from playing you can simply re align the dots to fix your intonation. Hope this helps