[Elecraft] Straight Key in parallel with PC keying

[K4GM-George]

Currently I manually switch between PC keying via a Microham Winkeyer 
which keys via N1MM and a straight key by unplugging and re-plugging in 
the back of the radio.  I have been reluctant to simply parallel the two 
by means of a Y cable for fear that sending with the straight key would 
place a direct short across the output of the winkeyer and wreak havoc 
on my winkeyer.   Am I being unduly concerned??  Or is there enough 
isolation built into the Winkeyer so that all will be well??   If I 
could use a Y cable I would have the PC, the paddle, and the straight 
key all available all the time which would be great.   Thanks in advance 
to all who respond.

73, George K4GM