No time now.
+10V supply and -10V supply
Feedback is OK but better after the transistors. (please tell me why)
Current mirrors do not work as well in real life with real transistors. So I added emitter resistors that should have about 1V across them. This will help reduce errors because the two transistors are
not exactly the same. (please think about this. Why emitter resistors help)
I did not check if you have enough current. 78.3 ohms is strange value. Probably not critical as long as you more than enough current. (peak current)
You have about 10V across the 78.3 ohms. So the emitter resistors could be 1/10 that value.
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