Happy New Year Chic. . .I just need to know the length of the extension you need (battery to PowerPack) and add two inches. We can make it up and ship it to you. Cost is minimal. 6mm FESTO elbo or 90 degree connector is no problem Just make sure the 6mm FESTO tubing is cut square and inserted completely in each end of the connector.
Certainly nothing to be concerned about with respects to the warranty.
Regards,
Eric