yes i think you are correct, the bit that should be 290mm , as long as you have the 69.5 to the bend & the chassis is 355mm from the build table to the top of the chassis then if so it should all be ok,
lets say you cut the two FF,s to the reqired 290mm will this then bring the top of your chassis down at the front to 355mm? if so then i think you,ve cracked it.
sorry if i was being long winded but i was trying to make sure the suspension bracket placings will still be correct for later in the build.
also in an earlier post you made you mention that the top of front frame was now not 75mm behind FF1, have you cut TR1 & TR2 to correct lengths? as thats the only reason i can see that you had to push the front frame forward a bit, ( this needs to be correct for suspension brackets, yes those pesky suspension brackets
)
cheers
andy