I made this a few years ago. Like you I also prefer 8 over 12. It was one of my first all grain batches and I unfortunately didn't keep very good notes on it. From what I remember it turned out well. It wasnt a dead ringer for Westy 8, but was fairly close and a good Dubbel. Friends and family...
You won't regret it. I'm new to this style but can tell after only a couple attempts that kegging makes a big difference as well as taking care not to oxidize when kegging.
Currently mashing my second batch of this right now. The first batch was made last year for a homebrew bar tour that my buddies and myself do every year and was a big hit.
This years batch is going to see some coffee added after reading guys having good luck with it. Thanks to Yooper and...