diff --git a/libraries/chain/db_maint.cpp b/libraries/chain/db_maint.cpp
index 742301ed..de4762fa 100644
--- a/libraries/chain/db_maint.cpp
+++ b/libraries/chain/db_maint.cpp
@@ -77,6 +77,32 @@ vector<std::reference_wrapper<const typename Index::object_type>> database::sort
    return refs;
 }
 
+template<>
+vector<std::reference_wrapper<const son_object>> database::sort_votable_objects<son_index>(size_t count) const
+{
+   const auto& all_sons = get_index_type<son_index>().indices().get< by_id >();
+   std::vector<std::reference_wrapper<const son_object>> refs;
+   for( auto& son : all_sons )
+   {
+      if(son.has_valid_config())
+      {
+         refs.push_back(std::cref(son));
+      }
+   }
+   count = std::min(count, refs.size());
+   std::partial_sort(refs.begin(), refs.begin() + count, refs.end(),
+                   [this](const son_object& a, const son_object& b)->bool {
+      share_type oa_vote = _vote_tally_buffer[a.vote_id];
+      share_type ob_vote = _vote_tally_buffer[b.vote_id];
+      if( oa_vote != ob_vote )
+         return oa_vote > ob_vote;
+      return a.vote_id < b.vote_id;
+   });
+
+   refs.resize(count, refs.front());
+   return refs;
+}
+
 template<class Type>
 void database::perform_account_maintenance(Type tally_helper)
 {
@@ -730,6 +756,13 @@ void database::update_active_sons()
          return swi.son_id;
       });
       _sso.scheduler.update(active_sons);
+      // similar to witness, produce schedule for sons
+      if(cur_active_sons.size() == 0 && new_active_sons.size() > 0)
+      {
+         witness_scheduler_rng rng(_sso.rng_seed.begin(), GRAPHENE_NEAR_SCHEDULE_CTR_IV);
+         for( size_t i=0; i<new_active_sons.size(); ++i )
+            _sso.scheduler.produce_schedule(rng);
+      }
    });
 } FC_CAPTURE_AND_RETHROW() }
 
diff --git a/libraries/chain/include/graphene/chain/son_object.hpp b/libraries/chain/include/graphene/chain/son_object.hpp
index 0bc87ecc..5d1adf20 100644
--- a/libraries/chain/include/graphene/chain/son_object.hpp
+++ b/libraries/chain/include/graphene/chain/son_object.hpp
@@ -73,6 +73,7 @@ namespace graphene { namespace chain {
          flat_map<sidechain_type, string> sidechain_public_keys;
 
          void pay_son_fee(share_type pay, database& db);
+         bool has_valid_config()const;
    };
 
    struct by_account;
diff --git a/libraries/chain/son_evaluator.cpp b/libraries/chain/son_evaluator.cpp
index 3974550f..2a849014 100644
--- a/libraries/chain/son_evaluator.cpp
+++ b/libraries/chain/son_evaluator.cpp
@@ -76,6 +76,7 @@ void_result delete_son_evaluator::do_evaluate(const son_delete_operation& op)
 void_result delete_son_evaluator::do_apply(const son_delete_operation& op)
 { try {
     const auto& idx = db().get_index_type<son_index>().indices().get<by_id>();
+    const auto& ss_idx = db().get_index_type<son_stats_index>().indices().get<by_id>();
     auto son = idx.find(op.son_id);
     if(son != idx.end()) {
        vesting_balance_object deposit = son->deposit(db());
@@ -88,6 +89,9 @@ void_result delete_son_evaluator::do_apply(const son_delete_operation& op)
           vbo.policy = new_vesting_policy;
        });
 
+       auto stats_obj = ss_idx.find(son->statistics);
+       if(stats_obj != ss_idx.end())
+          db().remove(*stats_obj);
        db().remove(*son);
     }
     return void_result();
diff --git a/libraries/chain/son_object.cpp b/libraries/chain/son_object.cpp
index 2d3c48ae..bf54c833 100644
--- a/libraries/chain/son_object.cpp
+++ b/libraries/chain/son_object.cpp
@@ -5,4 +5,11 @@ namespace graphene { namespace chain {
    void son_object::pay_son_fee(share_type pay, database& db) {
       db.adjust_balance(son_account, pay);
    }
+
+   bool son_object::has_valid_config()const {
+      return ((std::string(signing_key).length() > 0) &&
+             (sidechain_public_keys.size() > 0) &&
+             (sidechain_public_keys.find( sidechain_type::bitcoin ) != sidechain_public_keys.end()) &&
+             (sidechain_public_keys.at(sidechain_type::bitcoin).length() > 0));
+   }
 }}