Use food tweezers such as
THESE to pick up and position your olive spider legs precisely and without mess (U.S. option
HERE).
You can prepare each element up to 2 days in advance, but once assembled, these deviled eggs must be consumed on the same day.
Bonus: You'll have plenty of roasted pumpkin left over as a side dish for another meal ;)
The only way to ensure accurate measurement of ingredients is with Metric Kitchen Scales. Click
HERE for the ones I use, or
HERE for U.S. alternative.