[MT Stringer]

I would cut a pattern out of 1/2" mdf or plywood to use with a pattern bit in the router. You could use your jig saw to cut the pattern by cutting about 1/8" outside the line of your drawing and then sanding to the line to make sure you have a smooth edge. Cut your final pieces the same way (leaving the 1/8" excess) and then use the pattern you made to rout them to final size. The bearing on the pattern bit follows the curve of your pattern to give you a smooth, accurate final shape.

+1 What Oliver said.

 

[MT Stringer]

I did not realize that there are just a few 3/8" shank router bits, Whiteside website shows only 6 with 3/8" shanks and there are no spiral bits, just straight bits. I will have to decide between the Whiteside #1035 straight bit 3/8"SH, 3/8"CD, 1"CL for around $14 and the Amana 45400 2-flute for $16.

Horacio

Woah, hang on there a minute Horacio. According to the specs on your router, it uses 1/4 inch shank router bits. Whatever you buy needs to have a 1/4 inch shank. I am not sure where the 3/8 inch came from. Maybe you fat fingered the typing like I do sometimes, or got confused.

Your router is a compact model and may not work with large diameter cutters. Before you order, post a link so the guys can confirm for you. I would hate to see you get something you couldn't use.

Makita 1-1/4 HP Compact Router Kit RT0701CX3 | Acme Tools

Good luck.
Mike

 

[MT Stringer]

Top bearing
https://www.amazon.com/dp/B0000225X...9247-47786532c950&ie=UTF8&qid=1517533628&sr=2

Bottom bearing
https://www.amazon.com/Freud-Bearin...33063&sr=8-5&keywords=1/2+inch+flush+trim+bit

Combo (bearings top and bottom)
https://www.amazon.com/Whiteside-Ro...3063&sr=8-18&keywords=1/2+inch+flush+trim+bit

 

[MT Stringer]

I would use a top bearing mount router bit like I have linked to.
Then you only need to make a template of 1/2 of your drawing. I have attached a drawing of your drawing with additional dimensions.

Prepare your template like the one in the video.

Draw your template on your work piece. Then cut away the waste with the jig saw leaving just a little bit for the router to clean up. Attach your template to the top of your work piece with double sided tape and follow the template with the router bearing riding along the template.

And by all means, clamp your work piece if at all possible so it won't move and create an unsafe working condition for you.

Hope this helps.
Mike

 

[MT Stringer]

+1 What Eric said.
Here is an example...