The only thing you have to worry abut is the chain to sled rubbing against the pinned end of chain when the sled is in the top right or left extremes. This cause wobbly cuts for me until I noticed it. I worked out that 12" from end of top beam and 1/2" from top of top beam was safe on my frame (same as yours).
If you are buying a new bungee then you might consider doing an alternative tension design. I saw a good idea to run a closed loop of surgical tubing between the two gear cogs.
The above thread has loads of different designs. I have not tried any. I can say that the stock bungees on my frame cause slack chain in top left/right 1.5’ and in the bottom corners the tension is very high.