We'll have to create a new transaction then. If it turns out verifying isn't possible, can transactions be created deterministically? I recall there often being a minor difference when generating them. That part may not matter though. The idea being we all create the transaction independently so you can trust it, sign them separately, then merge the signed transactions into one with Cointoolkit, and broadcast.
@mhps Does it take forever or fail?
The signing page did load eventually, but only now I can input my key to sign. Currently signing.