The issue is with lesser pieds they tend to produce animals with small eyes.
BEL Super Lesser will tend to produce animals with bug eyes, so I would recommend Lesser x Mojave instead.
Trading for Spider is trading for another issue (wobble) which while most animals will live a normal life, the way people are now looking at Spiders has changed and they have become more difficult to sell which is ironic since they are not the only mutation that will wobble to a degree.
So know what can be paired what can't and whether the animals you will produce will be animals you will be stuck with or not.