I guess if you were lucky enough to have doppler installed on your 707 you can get GS. But otherwise, in basic nav. speed is of course determined by D/T. With the 707 you have your DME to determine distance but how do you come up with the time value to plug in the formula ? Or maybe I'm misinterpreting your comment Lou of getting GS by doing a time vs. distance calculation?
Mark, I'm glad I'm not alone in having to use spoilers to slow down.
Lou,when flying the CS 707 are you able to maintain proper speed during a decent without going for the speed brakes by doing those thing you described? Perhaps the CS model is inconsistent with the real world 707 in this respect? Or is it my lack of experience?
And Lou, in another thread I really enjoyed your tutorial on utilizing the LOM in capturing the LOC at the proper distance. While setting up my ILS approaches I always had the RMI  turned to VOR rather than ADF, and never took advantage of the LOM as you suggested. Great trick to keeping your heading just a bit outside of the outer marker to ensure you'll capture the LOC with plenty of distance from your runway. By not doing this, at times I found myself much to close in  upon capturing the LOC and had to scramble to make the approach. Not good.  This is why I really like flying these old planes. It forces you to think. So much fun.