5/3/1 modification question

http://www.t-nation.com/free_online_article/most_recent/531_reloaded

In this article Jim explains how he would modify his normal 5/3/1 template for a few reasons.

Since I train bjj 3 to 5 times a week iv been using his second modification for busy guys.

The only problem is I dont have access to a leg press which is included as an accessory (5x10) to deads and squats. For the past couple of weeks I have been doing front squats 3x10 in place of them.

Am I on the right path with this substitute or is there something else I should replace the front squats with?