Parallel Guides suited for cutting mitered corner cabinets?

[matthew75]

Hi everyone. I am looking at the best way to cut mitered corners for large veneered speaker cabinets. The largest plywood piece i will have to cut is 35 3/8" long and 15 5/8" wide. The mitered cuts will be at each end across the 15 5/8" width. I was hoping the Seneca Parallel guides would work well for this because I love how clean of an edge my track saw gives on veneered plywood. Need these to be perfect corners though that come together tightly and unsure if once i cut one mited end if the guides will be able to register properly off the mitered end to cut the other mitered end if that makes sense[/img]. I suppose my other option would be to make a large sled for my table saw but thought the parallel guides would make this simple and quick. Any advice or suggestions greatly appreciated. Photos below will hopefully help show what im trying to accomplish

 

[nclemmons]

I think the seneca guides would work fine for this.  I have a pair and if you have long enough Incra track, you can extend them as far as you need to. 

I'd do a test cut to make sure you are set at 45 degrees. 

Attached are a couple of photos of a sanding block I made when I was making a mitered mid-century china cabinet.  You might consider something like this to make sure your miters are crisp.  I used dominos but you could do a spline joint.  If you do dominos, make sure they are loose fitting as compressing the mitered corners can take pressure if there is too much resistance from captive glue or tight dominos -

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[ear3]

Oooh.  That's clever [member=167]neilc[/member] Will try that the next time I'm doing mitred case joints.

 

[matthew75]

Thanks Neil, that is a great idea. I appreciate the photos..i can grasp things so much better by seeing them. I do not have a domino but would love to...plan on using a dowelmax to join the corners

 

[tjbnwi]

Parallel guides or miter lock router bit. I've done over 7' long miter locks.

Tom