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It's a real pain, and a never ending source of frustration for me - especially when you go from a 5mm eyepiece, to 11m focal length with a CCD and small FOV.
I usually put the eyepiece in (5mm), center the planet and then adjust the finderscope (9x50 RA) so that the planet is centered in the crosshairs.
Then I put the DMK/5x powermate in, which takes it well away from where it was due to the weight difference. So then I use the RA finder and get the planet centered again. With any luck, I see it right away as it crosses the field.
I use something like 15fps, full gain, and slightly unfocused planet so that it covers a bigger/brighter area then when it's focused.
But I have had very frustating times sometimes, spending 5 minutes or more trying to find the bloody planet. I then switch to a 2x or 3x barlow and work my way up to the 5x, getting the RA finder accurately aligned each time.
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