Leonard Lopez wrote in news:2k0acbF16c0iuU1@uni- berlin.de:
What you 'should' use really depends on the design of the chair, and your 'religion' with regards to what constitutes a 'proper tool'.
Unless you are asking permission of the group to purchase another couple of tools (granted, by the way, without your having to ask), try using what you have on some scrap, and seeing if you like the results.
White Oak and Cypress are very different woods and respond somewhat differently to cutting and grinding tools.
I needed to do some shaping on a hard maple part for a project last month, and was running out of time for using the 4-in-1 hand rasp approach. A 36 grit disc chucked in the 4 inch low angle electric grinder allowed me to get the job done pretty quickly. Was it kosher? Who cares? This isn't really a religion, in spite of some of the arguments that carry on here.
Give it a try with your 6" ROS. See how you like it. Work safely.
Patriarch, who finds that shaping wooden hand plane bodies with a grinder is a liberating experience.